28720020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:158

約数の個数: 192

約数和(自身を含む): 99993600

約数和(自身を除く): 71273580

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 57, 59, 60, 61, 70, 76, 84, 95, 105, 114, 118, 122, 133, 140, 177, 183, 190, 210, 228, 236, 244, 266, 285, 295, 305, 354, 366, 380, 399, 413, 420, 427, 532, 570, 590, 610, 665, 708, 732, 798, 826, 854, 885, 915, 1121, 1140, 1159, 1180, 1220, 1239, 1281, 1330, 1596, 1652, 1708, 1770, 1830, 1995, 2065, 2135, 2242, 2318, 2478, 2562, 2660, 3363, 3477, 3540, 3599, 3660, 3990, 4130, 4270, 4484, 4636, 4956, 5124, 5605, 5795, 6195, 6405, 6726, 6954, 7198, 7847, 7980, 8113, 8260, 8540, 10797, 11210, 11590, 12390, 12810, 13452, 13908, 14396, 15694, 16226, 16815, 17385, 17995, 21594, 22420, 23180, 23541, 24339, 24780, 25193, 25620, 31388, 32452, 33630, 34770, 35990, 39235, 40565, 43188, 47082, 48678, 50386, 53985, 67260, 68381, 69540, 71980, 75579, 78470, 81130, 94164, 97356, 100772, 107970, 117705, 121695, 125965, 136762, 151158, 156940, 162260, 205143, 215940, 235410, 243390, 251930, 273524, 302316, 341905, 377895, 410286, 470820, 478667, 486780, 503860, 683810, 755790, 820572, 957334, 1025715, 1367620, 1436001, 1511580, 1914668, 2051430, 2393335, 2872002, 4102860, 4786670, 5744004, 7180005, 9573340, 14360010, 28720020]

約数ペア:

[(1, 28720020), (2, 14360010), (3, 9573340), (4, 7180005), (5, 5744004), (6, 4786670), (7, 4102860), (10, 2872002), (12, 2393335), (14, 2051430), (15, 1914668), (19, 1511580), (20, 1436001), (21, 1367620), (28, 1025715), (30, 957334), (35, 820572), (38, 755790), (42, 683810), (57, 503860), (59, 486780), (60, 478667), (61, 470820), (70, 410286), (76, 377895), (84, 341905), (95, 302316), (105, 273524), (114, 251930), (118, 243390), (122, 235410), (133, 215940), (140, 205143), (177, 162260), (183, 156940), (190, 151158), (210, 136762), (228, 125965), (236, 121695), (244, 117705), (266, 107970), (285, 100772), (295, 97356), (305, 94164), (354, 81130), (366, 78470), (380, 75579), (399, 71980), (413, 69540), (420, 68381), (427, 67260), (532, 53985), (570, 50386), (590, 48678), (610, 47082), (665, 43188), (708, 40565), (732, 39235), (798, 35990), (826, 34770), (854, 33630), (885, 32452), (915, 31388), (1121, 25620), (1140, 25193), (1159, 24780), (1180, 24339), (1220, 23541), (1239, 23180), (1281, 22420), (1330, 21594), (1596, 17995), (1652, 17385), (1708, 16815), (1770, 16226), (1830, 15694), (1995, 14396), (2065, 13908), (2135, 13452), (2242, 12810), (2318, 12390), (2478, 11590), (2562, 11210), (2660, 10797), (3363, 8540), (3477, 8260), (3540, 8113), (3599, 7980), (3660, 7847), (3990, 7198), (4130, 6954), (4270, 6726), (4484, 6405), (4636, 6195), (4956, 5795), (5124, 5605)]