21981999

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{191}}^1\times {\mathrm{227}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 32044032

約数和(自身を除く): 10062033

約数列:

[1, 3, 13, 39, 169, 191, 227, 507, 573, 681, 2483, 2951, 7449, 8853, 32279, 38363, 43357, 96837, 115089, 130071, 563641, 1690923, 7327333, 21981999]

約数ペア:

[(1, 21981999), (3, 7327333), (13, 1690923), (39, 563641), (169, 130071), (191, 115089), (227, 96837), (507, 43357), (573, 38363), (681, 32279), (2483, 8853), (2951, 7449)]