20197375

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:460

約数の個数: 32

約数和(自身を含む): 28312128

約数和(自身を除く): 8114753

約数列:

[1, 5, 11, 25, 37, 55, 125, 185, 275, 397, 407, 925, 1375, 1985, 2035, 4367, 4625, 9925, 10175, 14689, 21835, 49625, 50875, 73445, 109175, 161579, 367225, 545875, 807895, 1836125, 4039475, 20197375]

約数ペア:

[(1, 20197375), (5, 4039475), (11, 1836125), (25, 807895), (37, 545875), (55, 367225), (125, 161579), (185, 109175), (275, 73445), (397, 50875), (407, 49625), (925, 21835), (1375, 14689), (1985, 10175), (2035, 9925), (4367, 4625)]