20963905

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1\times {\mathrm{641}}^1$

素因数の和:888

約数の個数: 16

約数和(自身を含む): 26131968

約数和(自身を除く): 5168063

約数列:

[1, 5, 31, 155, 211, 641, 1055, 3205, 6541, 19871, 32705, 99355, 135251, 676255, 4192781, 20963905]

約数ペア:

[(1, 20963905), (5, 4192781), (31, 676255), (155, 135251), (211, 99355), (641, 32705), (1055, 19871), (3205, 6541)]