28013221820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1879}}^1\times {\mathrm{10499}}^1$

素因数の和:12458

約数の個数: 48

約数和(自身を含む): 59693760000

約数和(自身を除く): 31680538180

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 1879, 3758, 7516, 9395, 10499, 18790, 20998, 37580, 41996, 52495, 104990, 133409, 209980, 266818, 533636, 667045, 745429, 1334090, 1490858, 2668180, 2981716, 3727145, 7454290, 14908580, 19727621, 39455242, 78910484, 98638105, 197276210, 394552420, 1400661091, 2801322182, 5602644364, 7003305455, 14006610910, 28013221820]

約数ペア:

[(1, 28013221820), (2, 14006610910), (4, 7003305455), (5, 5602644364), (10, 2801322182), (20, 1400661091), (71, 394552420), (142, 197276210), (284, 98638105), (355, 78910484), (710, 39455242), (1420, 19727621), (1879, 14908580), (3758, 7454290), (7516, 3727145), (9395, 2981716), (10499, 2668180), (18790, 1490858), (20998, 1334090), (37580, 745429), (41996, 667045), (52495, 533636), (104990, 266818), (133409, 209980)]