988778890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{1459}}^1$

素因数の和:1639

約数の個数: 64

約数和(自身を含む): 1994336640

約数和(自身を除く): 1005557750

約数列:

[1, 2, 5, 10, 11, 22, 55, 61, 101, 110, 122, 202, 305, 505, 610, 671, 1010, 1111, 1342, 1459, 2222, 2918, 3355, 5555, 6161, 6710, 7295, 11110, 12322, 14590, 16049, 30805, 32098, 61610, 67771, 80245, 88999, 135542, 147359, 160490, 177998, 294718, 338855, 444995, 677710, 736795, 889990, 978989, 1473590, 1620949, 1957978, 3241898, 4894945, 8104745, 8988899, 9789890, 16209490, 17977798, 44944495, 89888990, 98877889, 197755778, 494389445, 988778890]

約数ペア:

[(1, 988778890), (2, 494389445), (5, 197755778), (10, 98877889), (11, 89888990), (22, 44944495), (55, 17977798), (61, 16209490), (101, 9789890), (110, 8988899), (122, 8104745), (202, 4894945), (305, 3241898), (505, 1957978), (610, 1620949), (671, 1473590), (1010, 978989), (1111, 889990), (1342, 736795), (1459, 677710), (2222, 444995), (2918, 338855), (3355, 294718), (5555, 177998), (6161, 160490), (6710, 147359), (7295, 135542), (11110, 88999), (12322, 80245), (14590, 67771), (16049, 61610), (30805, 32098)]