55140620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{661}}^1$

素因数の和:810

約数の個数: 48

約数和(自身を含む): 119890848

約数和(自身を除く): 64750228

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 97, 172, 194, 215, 388, 430, 485, 661, 860, 970, 1322, 1940, 2644, 3305, 4171, 6610, 8342, 13220, 16684, 20855, 28423, 41710, 56846, 64117, 83420, 113692, 128234, 142115, 256468, 284230, 320585, 568460, 641170, 1282340, 2757031, 5514062, 11028124, 13785155, 27570310, 55140620]

約数ペア:

[(1, 55140620), (2, 27570310), (4, 13785155), (5, 11028124), (10, 5514062), (20, 2757031), (43, 1282340), (86, 641170), (97, 568460), (172, 320585), (194, 284230), (215, 256468), (388, 142115), (430, 128234), (485, 113692), (661, 83420), (860, 64117), (970, 56846), (1322, 41710), (1940, 28423), (2644, 20855), (3305, 16684), (4171, 13220), (6610, 8342)]