21670705

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19973}}^1$

素因数の和:20016

約数の個数: 16

約数和(自身を含む): 30680064

約数和(自身を除く): 9009359

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19973, 99865, 139811, 619163, 699055, 3095815, 4334141, 21670705]

約数ペア:

[(1, 21670705), (5, 4334141), (7, 3095815), (31, 699055), (35, 619163), (155, 139811), (217, 99865), (1085, 19973)]