21142875

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{4337}}^1$

素因数の和:4368

約数の個数: 32

約数和(自身を含む): 37896768

約数和(自身を除く): 16753893

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 195, 325, 375, 975, 1625, 4337, 4875, 13011, 21685, 56381, 65055, 108425, 169143, 281905, 325275, 542125, 845715, 1409525, 1626375, 4228575, 7047625, 21142875]

約数ペア:

[(1, 21142875), (3, 7047625), (5, 4228575), (13, 1626375), (15, 1409525), (25, 845715), (39, 542125), (65, 325275), (75, 281905), (125, 169143), (195, 108425), (325, 65055), (375, 56381), (975, 21685), (1625, 13011), (4337, 4875)]