20108920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{38671}}^1$

素因数の和:38695

約数の個数: 32

約数和(自身を含む): 48726720

約数和(自身を除く): 28617800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 38671, 77342, 154684, 193355, 309368, 386710, 502723, 773420, 1005446, 1546840, 2010892, 2513615, 4021784, 5027230, 10054460, 20108920]

約数ペア:

[(1, 20108920), (2, 10054460), (4, 5027230), (5, 4021784), (8, 2513615), (10, 2010892), (13, 1546840), (20, 1005446), (26, 773420), (40, 502723), (52, 386710), (65, 309368), (104, 193355), (130, 154684), (260, 77342), (520, 38671)]