20457320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39341}}^1$

素因数の和:39365

約数の個数: 32

約数和(自身を含む): 49570920

約数和(自身を除く): 29113600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39341, 78682, 157364, 196705, 314728, 393410, 511433, 786820, 1022866, 1573640, 2045732, 2557165, 4091464, 5114330, 10228660, 20457320]

約数ペア:

[(1, 20457320), (2, 10228660), (4, 5114330), (5, 4091464), (8, 2557165), (10, 2045732), (13, 1573640), (20, 1022866), (26, 786820), (40, 511433), (52, 393410), (65, 314728), (104, 196705), (130, 157364), (260, 78682), (520, 39341)]