21815964

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{829}}^1$

素因数の和:899

約数の個数: 72

約数和(自身を含む): 59819760

約数和(自身を除く): 38003796

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 43, 51, 68, 86, 102, 129, 153, 172, 204, 258, 306, 387, 516, 612, 731, 774, 829, 1462, 1548, 1658, 2193, 2487, 2924, 3316, 4386, 4974, 6579, 7461, 8772, 9948, 13158, 14093, 14922, 26316, 28186, 29844, 35647, 42279, 56372, 71294, 84558, 106941, 126837, 142588, 169116, 213882, 253674, 320823, 427764, 507348, 605999, 641646, 1211998, 1283292, 1817997, 2423996, 3635994, 5453991, 7271988, 10907982, 21815964]

約数ペア:

[(1, 21815964), (2, 10907982), (3, 7271988), (4, 5453991), (6, 3635994), (9, 2423996), (12, 1817997), (17, 1283292), (18, 1211998), (34, 641646), (36, 605999), (43, 507348), (51, 427764), (68, 320823), (86, 253674), (102, 213882), (129, 169116), (153, 142588), (172, 126837), (204, 106941), (258, 84558), (306, 71294), (387, 56372), (516, 42279), (612, 35647), (731, 29844), (774, 28186), (829, 26316), (1462, 14922), (1548, 14093), (1658, 13158), (2193, 9948), (2487, 8772), (2924, 7461), (3316, 6579), (4386, 4974)]