21256554490

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{26907031}}^1$

素因数の和:26907117

約数の個数: 16

約数和(自身を含む): 38746126080

約数和(自身を除く): 17489571590

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 26907031, 53814062, 134535155, 269070310, 2125655449, 4251310898, 10628277245, 21256554490]

約数ペア:

[(1, 21256554490), (2, 10628277245), (5, 4251310898), (10, 2125655449), (79, 269070310), (158, 134535155), (395, 53814062), (790, 26907031)]