21428675

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{229}}^1$

素因数の和:455

約数の個数: 24

約数和(自身を含む): 28234800

約数和(自身を除く): 6806125

約数列:

[1, 5, 19, 25, 95, 197, 229, 475, 985, 1145, 3743, 4351, 4925, 5725, 18715, 21755, 45113, 93575, 108775, 225565, 857147, 1127825, 4285735, 21428675]

約数ペア:

[(1, 21428675), (5, 4285735), (19, 1127825), (25, 857147), (95, 225565), (197, 108775), (229, 93575), (475, 45113), (985, 21755), (1145, 18715), (3743, 5725), (4351, 4925)]