18787665

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:174

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 16048815

約数列:

[1, 3, 5, 13, 15, 23, 39, 59, 65, 69, 71, 115, 177, 195, 213, 295, 299, 345, 355, 767, 885, 897, 923, 1065, 1357, 1495, 1633, 2301, 2769, 3835, 4071, 4189, 4485, 4615, 4899, 6785, 8165, 11505, 12567, 13845, 17641, 20355, 20945, 21229, 24495, 52923, 54457, 62835, 63687, 88205, 96347, 106145, 163371, 264615, 272285, 289041, 318435, 481735, 816855, 1252511, 1445205, 3757533, 6262555, 18787665]

約数ペア:

[(1, 18787665), (3, 6262555), (5, 3757533), (13, 1445205), (15, 1252511), (23, 816855), (39, 481735), (59, 318435), (65, 289041), (69, 272285), (71, 264615), (115, 163371), (177, 106145), (195, 96347), (213, 88205), (295, 63687), (299, 62835), (345, 54457), (355, 52923), (767, 24495), (885, 21229), (897, 20945), (923, 20355), (1065, 17641), (1357, 13845), (1495, 12567), (1633, 11505), (2301, 8165), (2769, 6785), (3835, 4899), (4071, 4615), (4189, 4485)]