21656271

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{3449}}^1$

素因数の和:3495

約数の個数: 32

約数和(自身を含む): 37094400

約数和(自身を除く): 15438129

約数列:

[1, 3, 7, 13, 21, 23, 39, 69, 91, 161, 273, 299, 483, 897, 2093, 3449, 6279, 10347, 24143, 44837, 72429, 79327, 134511, 237981, 313859, 555289, 941577, 1031251, 1665867, 3093753, 7218757, 21656271]

約数ペア:

[(1, 21656271), (3, 7218757), (7, 3093753), (13, 1665867), (21, 1031251), (23, 941577), (39, 555289), (69, 313859), (91, 237981), (161, 134511), (273, 79327), (299, 72429), (483, 44837), (897, 24143), (2093, 10347), (3449, 6279)]