16978940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1087}}^1$

素因数の和:1178

約数の個数: 48

約数和(自身を含む): 39481344

約数和(自身を除く): 22502404

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 142, 220, 284, 355, 710, 781, 1087, 1420, 1562, 2174, 3124, 3905, 4348, 5435, 7810, 10870, 11957, 15620, 21740, 23914, 47828, 59785, 77177, 119570, 154354, 239140, 308708, 385885, 771770, 848947, 1543540, 1697894, 3395788, 4244735, 8489470, 16978940]

約数ペア:

[(1, 16978940), (2, 8489470), (4, 4244735), (5, 3395788), (10, 1697894), (11, 1543540), (20, 848947), (22, 771770), (44, 385885), (55, 308708), (71, 239140), (110, 154354), (142, 119570), (220, 77177), (284, 59785), (355, 47828), (710, 23914), (781, 21740), (1087, 15620), (1420, 11957), (1562, 10870), (2174, 7810), (3124, 5435), (3905, 4348)]