20118625

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:274

約数の個数: 32

約数和(自身を含む): 27181440

約数和(自身を除く): 7062815

約数列:

[1, 5, 19, 25, 43, 95, 125, 197, 215, 475, 817, 985, 1075, 2375, 3743, 4085, 4925, 5375, 8471, 18715, 20425, 24625, 42355, 93575, 102125, 160949, 211775, 467875, 804745, 1058875, 4023725, 20118625]

約数ペア:

[(1, 20118625), (5, 4023725), (19, 1058875), (25, 804745), (43, 467875), (95, 211775), (125, 160949), (197, 102125), (215, 93575), (475, 42355), (817, 24625), (985, 20425), (1075, 18715), (2375, 8471), (3743, 5375), (4085, 4925)]