19700520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{499}}^1$

素因数の和:567

約数の個数: 128

約数和(自身を含む): 69120000

約数和(自身を除く): 49419480

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 47, 56, 60, 70, 84, 94, 105, 120, 140, 141, 168, 188, 210, 235, 280, 282, 329, 376, 420, 470, 499, 564, 658, 705, 840, 940, 987, 998, 1128, 1316, 1410, 1497, 1645, 1880, 1974, 1996, 2495, 2632, 2820, 2994, 3290, 3493, 3948, 3992, 4935, 4990, 5640, 5988, 6580, 6986, 7485, 7896, 9870, 9980, 10479, 11976, 13160, 13972, 14970, 17465, 19740, 19960, 20958, 23453, 27944, 29940, 34930, 39480, 41916, 46906, 52395, 59880, 69860, 70359, 83832, 93812, 104790, 117265, 139720, 140718, 164171, 187624, 209580, 234530, 281436, 328342, 351795, 419160, 469060, 492513, 562872, 656684, 703590, 820855, 938120, 985026, 1313368, 1407180, 1641710, 1970052, 2462565, 2814360, 3283420, 3940104, 4925130, 6566840, 9850260, 19700520]

約数ペア:

[(1, 19700520), (2, 9850260), (3, 6566840), (4, 4925130), (5, 3940104), (6, 3283420), (7, 2814360), (8, 2462565), (10, 1970052), (12, 1641710), (14, 1407180), (15, 1313368), (20, 985026), (21, 938120), (24, 820855), (28, 703590), (30, 656684), (35, 562872), (40, 492513), (42, 469060), (47, 419160), (56, 351795), (60, 328342), (70, 281436), (84, 234530), (94, 209580), (105, 187624), (120, 164171), (140, 140718), (141, 139720), (168, 117265), (188, 104790), (210, 93812), (235, 83832), (280, 70359), (282, 69860), (329, 59880), (376, 52395), (420, 46906), (470, 41916), (499, 39480), (564, 34930), (658, 29940), (705, 27944), (840, 23453), (940, 20958), (987, 19960), (998, 19740), (1128, 17465), (1316, 14970), (1410, 13972), (1497, 13160), (1645, 11976), (1880, 10479), (1974, 9980), (1996, 9870), (2495, 7896), (2632, 7485), (2820, 6986), (2994, 6580), (3290, 5988), (3493, 5640), (3948, 4990), (3992, 4935)]