20217505

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{3089}}^1$

素因数の和:3129

約数の個数: 32

約数和(自身を含む): 32037120

約数和(自身を除く): 11819615

約数列:

[1, 5, 7, 11, 17, 35, 55, 77, 85, 119, 187, 385, 595, 935, 1309, 3089, 6545, 15445, 21623, 33979, 52513, 108115, 169895, 237853, 262565, 367591, 577643, 1189265, 1837955, 2888215, 4043501, 20217505]

約数ペア:

[(1, 20217505), (5, 4043501), (7, 2888215), (11, 1837955), (17, 1189265), (35, 577643), (55, 367591), (77, 262565), (85, 237853), (119, 169895), (187, 108115), (385, 52513), (595, 33979), (935, 21623), (1309, 15445), (3089, 6545)]