20001996

素因数分解:

$2^2\times 3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:93

約数の個数: 216

約数和(自身を含む): 67223520

約数和(自身を除く): 47221524

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 17, 18, 21, 23, 28, 29, 34, 36, 42, 46, 49, 51, 58, 63, 68, 69, 84, 87, 92, 98, 102, 116, 119, 126, 138, 147, 153, 161, 174, 196, 203, 204, 207, 238, 252, 261, 276, 294, 306, 322, 348, 357, 391, 406, 414, 441, 476, 483, 493, 522, 588, 609, 612, 644, 667, 714, 782, 812, 828, 833, 882, 966, 986, 1044, 1071, 1127, 1173, 1218, 1334, 1421, 1428, 1449, 1479, 1564, 1666, 1764, 1827, 1932, 1972, 2001, 2142, 2254, 2346, 2436, 2499, 2668, 2737, 2842, 2898, 2958, 3332, 3381, 3451, 3519, 3654, 4002, 4263, 4284, 4437, 4508, 4669, 4692, 4998, 5474, 5684, 5796, 5916, 6003, 6762, 6902, 7038, 7308, 7497, 8004, 8211, 8526, 8874, 9338, 9996, 10143, 10353, 10948, 11339, 12006, 12789, 13524, 13804, 14007, 14076, 14994, 16422, 17052, 17748, 18676, 19159, 20286, 20706, 22678, 24012, 24157, 24633, 25578, 28014, 29988, 31059, 32683, 32844, 34017, 38318, 40572, 41412, 42021, 45356, 48314, 49266, 51156, 56028, 57477, 62118, 65366, 68034, 72471, 76636, 79373, 84042, 96628, 98049, 98532, 102051, 114954, 124236, 130732, 136068, 144942, 158746, 168084, 172431, 196098, 204102, 217413, 229908, 238119, 289884, 294147, 317492, 344862, 392196, 408204, 434826, 476238, 555611, 588294, 689724, 714357, 869652, 952476, 1111222, 1176588, 1428714, 1666833, 2222444, 2857428, 3333666, 5000499, 6667332, 10000998, 20001996]

約数ペア:

[(1, 20001996), (2, 10000998), (3, 6667332), (4, 5000499), (6, 3333666), (7, 2857428), (9, 2222444), (12, 1666833), (14, 1428714), (17, 1176588), (18, 1111222), (21, 952476), (23, 869652), (28, 714357), (29, 689724), (34, 588294), (36, 555611), (42, 476238), (46, 434826), (49, 408204), (51, 392196), (58, 344862), (63, 317492), (68, 294147), (69, 289884), (84, 238119), (87, 229908), (92, 217413), (98, 204102), (102, 196098), (116, 172431), (119, 168084), (126, 158746), (138, 144942), (147, 136068), (153, 130732), (161, 124236), (174, 114954), (196, 102051), (203, 98532), (204, 98049), (207, 96628), (238, 84042), (252, 79373), (261, 76636), (276, 72471), (294, 68034), (306, 65366), (322, 62118), (348, 57477), (357, 56028), (391, 51156), (406, 49266), (414, 48314), (441, 45356), (476, 42021), (483, 41412), (493, 40572), (522, 38318), (588, 34017), (609, 32844), (612, 32683), (644, 31059), (667, 29988), (714, 28014), (782, 25578), (812, 24633), (828, 24157), (833, 24012), (882, 22678), (966, 20706), (986, 20286), (1044, 19159), (1071, 18676), (1127, 17748), (1173, 17052), (1218, 16422), (1334, 14994), (1421, 14076), (1428, 14007), (1449, 13804), (1479, 13524), (1564, 12789), (1666, 12006), (1764, 11339), (1827, 10948), (1932, 10353), (1972, 10143), (2001, 9996), (2142, 9338), (2254, 8874), (2346, 8526), (2436, 8211), (2499, 8004), (2668, 7497), (2737, 7308), (2842, 7038), (2898, 6902), (2958, 6762), (3332, 6003), (3381, 5916), (3451, 5796), (3519, 5684), (3654, 5474), (4002, 4998), (4263, 4692), (4284, 4669), (4437, 4508)]