81731000

素因数分解:

$2^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{6287}}^1$

素因数の和:6321

約数の個数: 64

約数和(自身を含む): 205994880

約数和(自身を除く): 124263880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 325, 500, 520, 650, 1000, 1300, 1625, 2600, 3250, 6287, 6500, 12574, 13000, 25148, 31435, 50296, 62870, 81731, 125740, 157175, 163462, 251480, 314350, 326924, 408655, 628700, 653848, 785875, 817310, 1257400, 1571750, 1634620, 2043275, 3143500, 3269240, 4086550, 6287000, 8173100, 10216375, 16346200, 20432750, 40865500, 81731000]

約数ペア:

[(1, 81731000), (2, 40865500), (4, 20432750), (5, 16346200), (8, 10216375), (10, 8173100), (13, 6287000), (20, 4086550), (25, 3269240), (26, 3143500), (40, 2043275), (50, 1634620), (52, 1571750), (65, 1257400), (100, 817310), (104, 785875), (125, 653848), (130, 628700), (200, 408655), (250, 326924), (260, 314350), (325, 251480), (500, 163462), (520, 157175), (650, 125740), (1000, 81731), (1300, 62870), (1625, 50296), (2600, 31435), (3250, 25148), (6287, 13000), (6500, 12574)]