7801820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{811}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 18143328

約数和(自身を除く): 10341508

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 185, 260, 370, 481, 740, 811, 962, 1622, 1924, 2405, 3244, 4055, 4810, 8110, 9620, 10543, 16220, 21086, 30007, 42172, 52715, 60014, 105430, 120028, 150035, 210860, 300070, 390091, 600140, 780182, 1560364, 1950455, 3900910, 7801820]

約数ペア:

[(1, 7801820), (2, 3900910), (4, 1950455), (5, 1560364), (10, 780182), (13, 600140), (20, 390091), (26, 300070), (37, 210860), (52, 150035), (65, 120028), (74, 105430), (130, 60014), (148, 52715), (185, 42172), (260, 30007), (370, 21086), (481, 16220), (740, 10543), (811, 9620), (962, 8110), (1622, 4810), (1924, 4055), (2405, 3244)]