18815355

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 17956485

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 71, 117, 135, 151, 195, 213, 351, 355, 453, 585, 639, 755, 923, 1065, 1359, 1755, 1917, 1963, 2265, 2769, 3195, 4077, 4615, 5889, 6795, 8307, 9585, 9815, 10721, 13845, 17667, 20385, 24921, 29445, 32163, 41535, 53001, 53605, 88335, 96489, 124605, 139373, 160815, 265005, 289467, 418119, 482445, 696865, 1254357, 1447335, 2090595, 3763071, 6271785, 18815355]

約数ペア:

[(1, 18815355), (3, 6271785), (5, 3763071), (9, 2090595), (13, 1447335), (15, 1254357), (27, 696865), (39, 482445), (45, 418119), (65, 289467), (71, 265005), (117, 160815), (135, 139373), (151, 124605), (195, 96489), (213, 88335), (351, 53605), (355, 53001), (453, 41535), (585, 32163), (639, 29445), (755, 24921), (923, 20385), (1065, 17667), (1359, 13845), (1755, 10721), (1917, 9815), (1963, 9585), (2265, 8307), (2769, 6795), (3195, 5889), (4077, 4615)]