20561320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39541}}^1$

素因数の和:39565

約数の個数: 32

約数和(自身を含む): 49822920

約数和(自身を除く): 29261600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39541, 79082, 158164, 197705, 316328, 395410, 514033, 790820, 1028066, 1581640, 2056132, 2570165, 4112264, 5140330, 10280660, 20561320]

約数ペア:

[(1, 20561320), (2, 10280660), (4, 5140330), (5, 4112264), (8, 2570165), (10, 2056132), (13, 1581640), (20, 1028066), (26, 790820), (40, 514033), (52, 395410), (65, 316328), (104, 197705), (130, 158164), (260, 79082), (520, 39541)]