1405989

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:277

約数の個数: 24

約数和(自身を含む): 2234232

約数和(自身を除く): 828243

約数列:

[1, 3, 9, 13, 39, 61, 117, 183, 197, 549, 591, 793, 1773, 2379, 2561, 7137, 7683, 12017, 23049, 36051, 108153, 156221, 468663, 1405989]

約数ペア:

[(1, 1405989), (3, 468663), (9, 156221), (13, 108153), (39, 36051), (61, 23049), (117, 12017), (183, 7683), (197, 7137), (549, 2561), (591, 2379), (793, 1773)]