19403890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{419}}^1\times {\mathrm{421}}^1$

素因数の和:858

約数の個数: 32

約数和(自身を含む): 38283840

約数和(自身を除く): 18879950

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 419, 421, 838, 842, 2095, 2105, 4190, 4210, 4609, 4631, 9218, 9262, 23045, 23155, 46090, 46310, 176399, 352798, 881995, 1763990, 1940389, 3880778, 9701945, 19403890]

約数ペア:

[(1, 19403890), (2, 9701945), (5, 3880778), (10, 1940389), (11, 1763990), (22, 881995), (55, 352798), (110, 176399), (419, 46310), (421, 46090), (838, 23155), (842, 23045), (2095, 9262), (2105, 9218), (4190, 4631), (4210, 4609)]