20218640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19441}}^1$

素因数の和:19467

約数の個数: 40

約数和(自身を含む): 50626968

約数和(自身を除く): 30408328

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19441, 38882, 77764, 97205, 155528, 194410, 252733, 311056, 388820, 505466, 777640, 1010932, 1263665, 1555280, 2021864, 2527330, 4043728, 5054660, 10109320, 20218640]

約数ペア:

[(1, 20218640), (2, 10109320), (4, 5054660), (5, 4043728), (8, 2527330), (10, 2021864), (13, 1555280), (16, 1263665), (20, 1010932), (26, 777640), (40, 505466), (52, 388820), (65, 311056), (80, 252733), (104, 194410), (130, 155528), (208, 97205), (260, 77764), (520, 38882), (1040, 19441)]