21457917

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{761}}^1$

素因数の和:1021

約数の個数: 24

約数和(自身を含む): 33561528

約数和(自身を除く): 12103611

約数列:

[1, 3, 9, 13, 39, 117, 241, 723, 761, 2169, 2283, 3133, 6849, 9399, 9893, 28197, 29679, 89037, 183401, 550203, 1650609, 2384213, 7152639, 21457917]

約数ペア:

[(1, 21457917), (3, 7152639), (9, 2384213), (13, 1650609), (39, 550203), (117, 183401), (241, 89037), (723, 29679), (761, 28197), (2169, 9893), (2283, 9399), (3133, 6849)]