21279625

素因数分解:

$5^3\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:202

約数の個数: 32

約数和(自身を含む): 28169856

約数和(自身を除く): 6890231

約数列:

[1, 5, 25, 37, 43, 107, 125, 185, 215, 535, 925, 1075, 1591, 2675, 3959, 4601, 4625, 5375, 7955, 13375, 19795, 23005, 39775, 98975, 115025, 170237, 198875, 494875, 575125, 851185, 4255925, 21279625]

約数ペア:

[(1, 21279625), (5, 4255925), (25, 851185), (37, 575125), (43, 494875), (107, 198875), (125, 170237), (185, 115025), (215, 98975), (535, 39775), (925, 23005), (1075, 19795), (1591, 13375), (2675, 7955), (3959, 5375), (4601, 4625)]