19989320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2957}}^1$

素因数の和:2994

約数の個数: 48

約数和(自身を含む): 48718260

約数和(自身を除く): 28728940

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 2957, 3380, 5914, 6760, 11828, 14785, 23656, 29570, 38441, 59140, 76882, 118280, 153764, 192205, 307528, 384410, 499733, 768820, 999466, 1537640, 1998932, 2498665, 3997864, 4997330, 9994660, 19989320]

約数ペア:

[(1, 19989320), (2, 9994660), (4, 4997330), (5, 3997864), (8, 2498665), (10, 1998932), (13, 1537640), (20, 999466), (26, 768820), (40, 499733), (52, 384410), (65, 307528), (104, 192205), (130, 153764), (169, 118280), (260, 76882), (338, 59140), (520, 38441), (676, 29570), (845, 23656), (1352, 14785), (1690, 11828), (2957, 6760), (3380, 5914)]