18818960

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3511}}^1$

素因数の和:3591

約数の個数: 40

約数和(自身を含む): 44419776

約数和(自身を除く): 25600816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3511, 5360, 7022, 14044, 17555, 28088, 35110, 56176, 70220, 140440, 235237, 280880, 470474, 940948, 1176185, 1881896, 2352370, 3763792, 4704740, 9409480, 18818960]

約数ペア:

[(1, 18818960), (2, 9409480), (4, 4704740), (5, 3763792), (8, 2352370), (10, 1881896), (16, 1176185), (20, 940948), (40, 470474), (67, 280880), (80, 235237), (134, 140440), (268, 70220), (335, 56176), (536, 35110), (670, 28088), (1072, 17555), (1340, 14044), (2680, 7022), (3511, 5360)]