81859240

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{4861}}^1$

素因数の和:5293

約数の個数: 32

約数和(自身を含む): 184658760

約数和(自身を除く): 102799520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 4861, 8420, 9722, 16840, 19444, 24305, 38888, 48610, 97220, 194440, 2046481, 4092962, 8185924, 10232405, 16371848, 20464810, 40929620, 81859240]

約数ペア:

[(1, 81859240), (2, 40929620), (4, 20464810), (5, 16371848), (8, 10232405), (10, 8185924), (20, 4092962), (40, 2046481), (421, 194440), (842, 97220), (1684, 48610), (2105, 38888), (3368, 24305), (4210, 19444), (4861, 16840), (8420, 9722)]