128889747

素因数分解:

$3^2\times 7^2\times {\mathrm{292267}}^1$

素因数の和:292287

約数の個数: 18

約数和(自身を含む): 216570588

約数和(自身を除く): 87680841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 292267, 876801, 2045869, 2630403, 6137607, 14321083, 18412821, 42963249, 128889747]

約数ペア:

[(1, 128889747), (3, 42963249), (7, 18412821), (9, 14321083), (21, 6137607), (49, 2630403), (63, 2045869), (147, 876801), (441, 292267)]