21525231

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2131}}^1$

素因数の和:2191

約数の個数: 32

約数和(自身を含む): 36295168

約数和(自身を除く): 14769937

約数列:

[1, 3, 7, 13, 21, 37, 39, 91, 111, 259, 273, 481, 777, 1443, 2131, 3367, 6393, 10101, 14917, 27703, 44751, 78847, 83109, 193921, 236541, 551929, 581763, 1025011, 1655787, 3075033, 7175077, 21525231]

約数ペア:

[(1, 21525231), (3, 7175077), (7, 3075033), (13, 1655787), (21, 1025011), (37, 581763), (39, 551929), (91, 236541), (111, 193921), (259, 83109), (273, 78847), (481, 44751), (777, 27703), (1443, 14917), (2131, 10101), (3367, 6393)]