21238576

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{691}}^1$

素因数の和:829

約数の個数: 40

約数和(自身を含む): 44019504

約数和(自身を除く): 22780928

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 113, 136, 226, 272, 452, 691, 904, 1382, 1808, 1921, 2764, 3842, 5528, 7684, 11056, 11747, 15368, 23494, 30736, 46988, 78083, 93976, 156166, 187952, 312332, 624664, 1249328, 1327411, 2654822, 5309644, 10619288, 21238576]

約数ペア:

[(1, 21238576), (2, 10619288), (4, 5309644), (8, 2654822), (16, 1327411), (17, 1249328), (34, 624664), (68, 312332), (113, 187952), (136, 156166), (226, 93976), (272, 78083), (452, 46988), (691, 30736), (904, 23494), (1382, 15368), (1808, 11747), (1921, 11056), (2764, 7684), (3842, 5528)]