21295505

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{55313}}^1$

素因数の和:55336

約数の個数: 16

約数和(自身を含む): 31860864

約数和(自身を除く): 10565359

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 55313, 276565, 387191, 608443, 1935955, 3042215, 4259101, 21295505]

約数ペア:

[(1, 21295505), (5, 4259101), (7, 3042215), (11, 1935955), (35, 608443), (55, 387191), (77, 276565), (385, 55313)]