19947473

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 26342400

約数和(自身を除く): 6394927

約数列:

[1, 7, 13, 19, 83, 91, 133, 139, 247, 581, 973, 1079, 1577, 1729, 1807, 2641, 7553, 11039, 11537, 12649, 18487, 20501, 34333, 80759, 143507, 149981, 219203, 240331, 1049867, 1534421, 2849639, 19947473]

約数ペア:

[(1, 19947473), (7, 2849639), (13, 1534421), (19, 1049867), (83, 240331), (91, 219203), (133, 149981), (139, 143507), (247, 80759), (581, 34333), (973, 20501), (1079, 18487), (1577, 12649), (1729, 11537), (1807, 11039), (2641, 7553)]