21420125

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{311}}^1$

素因数の和:374

約数の個数: 32

約数和(自身を含む): 29203200

約数和(自身を除く): 7783075

約数列:

[1, 5, 19, 25, 29, 95, 125, 145, 311, 475, 551, 725, 1555, 2375, 2755, 3625, 5909, 7775, 9019, 13775, 29545, 38875, 45095, 68875, 147725, 171361, 225475, 738625, 856805, 1127375, 4284025, 21420125]

約数ペア:

[(1, 21420125), (5, 4284025), (19, 1127375), (25, 856805), (29, 738625), (95, 225475), (125, 171361), (145, 147725), (311, 68875), (475, 45095), (551, 38875), (725, 29545), (1555, 13775), (2375, 9019), (2755, 7775), (3625, 5909)]