21428390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{3889}}^1$

素因数の和:3944

約数の個数: 32

約数和(自身を含む): 42012000

約数和(自身を除く): 20583610

約数列:

[1, 2, 5, 10, 19, 29, 38, 58, 95, 145, 190, 290, 551, 1102, 2755, 3889, 5510, 7778, 19445, 38890, 73891, 112781, 147782, 225562, 369455, 563905, 738910, 1127810, 2142839, 4285678, 10714195, 21428390]

約数ペア:

[(1, 21428390), (2, 10714195), (5, 4285678), (10, 2142839), (19, 1127810), (29, 738910), (38, 563905), (58, 369455), (95, 225562), (145, 147782), (190, 112781), (290, 73891), (551, 38890), (1102, 19445), (2755, 7778), (3889, 5510)]