64400720

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{21757}}^1$

素因数の和:21807

約数の個数: 40

約数和(自身を含む): 153785544

約数和(自身を除く): 89384824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 21757, 43514, 87028, 108785, 174056, 217570, 348112, 435140, 805009, 870280, 1610018, 1740560, 3220036, 4025045, 6440072, 8050090, 12880144, 16100180, 32200360, 64400720]

約数ペア:

[(1, 64400720), (2, 32200360), (4, 16100180), (5, 12880144), (8, 8050090), (10, 6440072), (16, 4025045), (20, 3220036), (37, 1740560), (40, 1610018), (74, 870280), (80, 805009), (148, 435140), (185, 348112), (296, 217570), (370, 174056), (592, 108785), (740, 87028), (1480, 43514), (2960, 21757)]