21647375

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:260

約数の個数: 32

約数和(自身を含む): 29248128

約数和(自身を除く): 7600753

約数列:

[1, 5, 17, 25, 61, 85, 125, 167, 305, 425, 835, 1037, 1525, 2125, 2839, 4175, 5185, 7625, 10187, 14195, 20875, 25925, 50935, 70975, 129625, 173179, 254675, 354875, 865895, 1273375, 4329475, 21647375]

約数ペア:

[(1, 21647375), (5, 4329475), (17, 1273375), (25, 865895), (61, 354875), (85, 254675), (125, 173179), (167, 129625), (305, 70975), (425, 50935), (835, 25925), (1037, 20875), (1525, 14195), (2125, 10187), (2839, 7625), (4175, 5185)]