20120804977

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{644629}}^1$

素因数の和:644670

約数の個数: 20

約数和(自身を含む): 25278520820

約数和(自身を除く): 5157715843

約数列:

[1, 7, 13, 49, 91, 343, 637, 2401, 4459, 31213, 644629, 4512403, 8380177, 31586821, 58661239, 221107747, 410628673, 1547754229, 2874400711, 20120804977]

約数ペア:

[(1, 20120804977), (7, 2874400711), (13, 1547754229), (49, 410628673), (91, 221107747), (343, 58661239), (637, 31586821), (2401, 8380177), (4459, 4512403), (31213, 644629)]