1991223

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:117

約数の個数: 40

約数和(自身を含む): 3360896

約数和(自身を除く): 1369673

約数列:

[1, 3, 9, 13, 27, 31, 39, 61, 81, 93, 117, 183, 279, 351, 403, 549, 793, 837, 1053, 1209, 1647, 1891, 2379, 2511, 3627, 4941, 5673, 7137, 10881, 17019, 21411, 24583, 32643, 51057, 64233, 73749, 153171, 221247, 663741, 1991223]

約数ペア:

[(1, 1991223), (3, 663741), (9, 221247), (13, 153171), (27, 73749), (31, 64233), (39, 51057), (61, 32643), (81, 24583), (93, 21411), (117, 17019), (183, 10881), (279, 7137), (351, 5673), (403, 4941), (549, 3627), (793, 2511), (837, 2379), (1053, 1891), (1209, 1647)]