21498813

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{401}}^1$

素因数の和:474

約数の個数: 48

約数和(自身を含む): 38128896

約数和(自身を除く): 16630083

約数列:

[1, 3, 7, 9, 21, 23, 37, 63, 69, 111, 161, 207, 259, 333, 401, 483, 777, 851, 1203, 1449, 2331, 2553, 2807, 3609, 5957, 7659, 8421, 9223, 14837, 17871, 25263, 27669, 44511, 53613, 64561, 83007, 103859, 133533, 193683, 311577, 341251, 581049, 934731, 1023753, 2388757, 3071259, 7166271, 21498813]

約数ペア:

[(1, 21498813), (3, 7166271), (7, 3071259), (9, 2388757), (21, 1023753), (23, 934731), (37, 581049), (63, 341251), (69, 311577), (111, 193683), (161, 133533), (207, 103859), (259, 83007), (333, 64561), (401, 53613), (483, 44511), (777, 27669), (851, 25263), (1203, 17871), (1449, 14837), (2331, 9223), (2553, 8421), (2807, 7659), (3609, 5957)]