20983340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2111}}^1$

素因数の和:2198

約数の個数: 48

約数和(自身を含む): 51093504

約数和(自身を除く): 30110164

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2111, 2485, 4222, 4970, 8444, 9940, 10555, 14777, 21110, 29554, 42220, 59108, 73885, 147770, 149881, 295540, 299762, 599524, 749405, 1049167, 1498810, 2098334, 2997620, 4196668, 5245835, 10491670, 20983340]

約数ペア:

[(1, 20983340), (2, 10491670), (4, 5245835), (5, 4196668), (7, 2997620), (10, 2098334), (14, 1498810), (20, 1049167), (28, 749405), (35, 599524), (70, 299762), (71, 295540), (140, 149881), (142, 147770), (284, 73885), (355, 59108), (497, 42220), (710, 29554), (994, 21110), (1420, 14777), (1988, 10555), (2111, 9940), (2485, 8444), (4222, 4970)]