28640745

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:475

約数の個数: 72

約数和(自身を含む): 59754240

約数和(自身を除く): 31113495

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 49, 63, 93, 105, 147, 155, 217, 245, 279, 315, 419, 441, 465, 651, 735, 1085, 1257, 1395, 1519, 1953, 2095, 2205, 2933, 3255, 3771, 4557, 6285, 7595, 8799, 9765, 12989, 13671, 14665, 18855, 20531, 22785, 26397, 38967, 43995, 61593, 64945, 68355, 90923, 102655, 116901, 131985, 184779, 194835, 272769, 307965, 454615, 584505, 636461, 818307, 923895, 1363845, 1909383, 3182305, 4091535, 5728149, 9546915, 28640745]

約数ペア:

[(1, 28640745), (3, 9546915), (5, 5728149), (7, 4091535), (9, 3182305), (15, 1909383), (21, 1363845), (31, 923895), (35, 818307), (45, 636461), (49, 584505), (63, 454615), (93, 307965), (105, 272769), (147, 194835), (155, 184779), (217, 131985), (245, 116901), (279, 102655), (315, 90923), (419, 68355), (441, 64945), (465, 61593), (651, 43995), (735, 38967), (1085, 26397), (1257, 22785), (1395, 20531), (1519, 18855), (1953, 14665), (2095, 13671), (2205, 12989), (2933, 9765), (3255, 8799), (3771, 7595), (4557, 6285)]