21385875

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{8147}}^1$

素因数の和:8172

約数の個数: 32

約数和(自身を含む): 40674816

約数和(自身を除く): 19288941

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 125, 175, 375, 525, 875, 2625, 8147, 24441, 40735, 57029, 122205, 171087, 203675, 285145, 611025, 855435, 1018375, 1425725, 3055125, 4277175, 7128625, 21385875]

約数ペア:

[(1, 21385875), (3, 7128625), (5, 4277175), (7, 3055125), (15, 1425725), (21, 1018375), (25, 855435), (35, 611025), (75, 285145), (105, 203675), (125, 171087), (175, 122205), (375, 57029), (525, 40735), (875, 24441), (2625, 8147)]