18986877

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{239}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 34245120

約数和(自身を除く): 15258243

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 97, 117, 239, 273, 291, 679, 717, 819, 873, 1261, 1673, 2037, 2151, 3107, 3783, 5019, 6111, 8827, 9321, 11349, 15057, 21749, 23183, 26481, 27963, 65247, 69549, 79443, 162281, 195741, 208647, 301379, 486843, 904137, 1460529, 2109653, 2712411, 6328959, 18986877]

約数ペア:

[(1, 18986877), (3, 6328959), (7, 2712411), (9, 2109653), (13, 1460529), (21, 904137), (39, 486843), (63, 301379), (91, 208647), (97, 195741), (117, 162281), (239, 79443), (273, 69549), (291, 65247), (679, 27963), (717, 26481), (819, 23183), (873, 21749), (1261, 15057), (1673, 11349), (2037, 9321), (2151, 8827), (3107, 6111), (3783, 5019)]