20717320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39841}}^1$

素因数の和:39865

約数の個数: 32

約数和(自身を含む): 50200920

約数和(自身を除く): 29483600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39841, 79682, 159364, 199205, 318728, 398410, 517933, 796820, 1035866, 1593640, 2071732, 2589665, 4143464, 5179330, 10358660, 20717320]

約数ペア:

[(1, 20717320), (2, 10358660), (4, 5179330), (5, 4143464), (8, 2589665), (10, 2071732), (13, 1593640), (20, 1035866), (26, 796820), (40, 517933), (52, 398410), (65, 318728), (104, 199205), (130, 159364), (260, 79682), (520, 39841)]