20601980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:195

約数の個数: 96

約数和(自身を含む): 52641792

約数和(自身を除く): 32039812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 47, 62, 70, 94, 101, 124, 140, 155, 188, 202, 217, 235, 310, 329, 404, 434, 470, 505, 620, 658, 707, 868, 940, 1010, 1085, 1316, 1414, 1457, 1645, 2020, 2170, 2828, 2914, 3131, 3290, 3535, 4340, 4747, 5828, 6262, 6580, 7070, 7285, 9494, 10199, 12524, 14140, 14570, 15655, 18988, 20398, 21917, 23735, 29140, 31310, 33229, 40796, 43834, 47470, 50995, 62620, 66458, 87668, 94940, 101990, 109585, 132916, 147157, 166145, 203980, 219170, 294314, 332290, 438340, 588628, 664580, 735785, 1030099, 1471570, 2060198, 2943140, 4120396, 5150495, 10300990, 20601980]

約数ペア:

[(1, 20601980), (2, 10300990), (4, 5150495), (5, 4120396), (7, 2943140), (10, 2060198), (14, 1471570), (20, 1030099), (28, 735785), (31, 664580), (35, 588628), (47, 438340), (62, 332290), (70, 294314), (94, 219170), (101, 203980), (124, 166145), (140, 147157), (155, 132916), (188, 109585), (202, 101990), (217, 94940), (235, 87668), (310, 66458), (329, 62620), (404, 50995), (434, 47470), (470, 43834), (505, 40796), (620, 33229), (658, 31310), (707, 29140), (868, 23735), (940, 21917), (1010, 20398), (1085, 18988), (1316, 15655), (1414, 14570), (1457, 14140), (1645, 12524), (2020, 10199), (2170, 9494), (2828, 7285), (2914, 7070), (3131, 6580), (3290, 6262), (3535, 5828), (4340, 4747)]