81520816

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{1123}}^1$

素因数の和:1493

約数の個数: 40

約数和(自身を含む): 170735600

約数和(自身を除く): 89214784

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 349, 698, 1123, 1396, 2246, 2792, 4492, 4537, 5584, 8984, 9074, 14599, 17968, 18148, 29198, 36296, 58396, 72592, 116792, 233584, 391927, 783854, 1567708, 3135416, 5095051, 6270832, 10190102, 20380204, 40760408, 81520816]

約数ペア:

[(1, 81520816), (2, 40760408), (4, 20380204), (8, 10190102), (13, 6270832), (16, 5095051), (26, 3135416), (52, 1567708), (104, 783854), (208, 391927), (349, 233584), (698, 116792), (1123, 72592), (1396, 58396), (2246, 36296), (2792, 29198), (4492, 18148), (4537, 17968), (5584, 14599), (8984, 9074)]