21290630

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:233

約数の個数: 48

約数和(自身を含む): 41776560

約数和(自身を除く): 20485930

約数列:

[1, 2, 5, 10, 17, 34, 53, 85, 106, 139, 170, 265, 278, 289, 530, 578, 695, 901, 1390, 1445, 1802, 2363, 2890, 4505, 4726, 7367, 9010, 11815, 14734, 15317, 23630, 30634, 36835, 40171, 73670, 76585, 80342, 125239, 153170, 200855, 250478, 401710, 626195, 1252390, 2129063, 4258126, 10645315, 21290630]

約数ペア:

[(1, 21290630), (2, 10645315), (5, 4258126), (10, 2129063), (17, 1252390), (34, 626195), (53, 401710), (85, 250478), (106, 200855), (139, 153170), (170, 125239), (265, 80342), (278, 76585), (289, 73670), (530, 40171), (578, 36835), (695, 30634), (901, 23630), (1390, 15317), (1445, 14734), (1802, 11815), (2363, 9010), (2890, 7367), (4505, 4726)]