21317075

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{613}}^1$

素因数の和:743

約数の個数: 24

約数和(自身を含む): 28779408

約数和(自身を除く): 7462333

約数列:

[1, 5, 13, 25, 65, 107, 325, 535, 613, 1391, 2675, 3065, 6955, 7969, 15325, 34775, 39845, 65591, 199225, 327955, 852683, 1639775, 4263415, 21317075]

約数ペア:

[(1, 21317075), (5, 4263415), (13, 1639775), (25, 852683), (65, 327955), (107, 199225), (325, 65591), (535, 39845), (613, 34775), (1391, 15325), (2675, 7969), (3065, 6955)]