21207906

素因数分解:

$2^1\times 3^4\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:189

約数の個数: 80

約数和(自身を含む): 50738688

約数和(自身を除く): 29530782

約数列:

[1, 2, 3, 6, 9, 18, 27, 31, 41, 54, 62, 81, 82, 93, 103, 123, 162, 186, 206, 246, 279, 309, 369, 558, 618, 738, 837, 927, 1107, 1271, 1674, 1854, 2214, 2511, 2542, 2781, 3193, 3321, 3813, 4223, 5022, 5562, 6386, 6642, 7626, 8343, 8446, 9579, 11439, 12669, 16686, 19158, 22878, 25338, 28737, 34317, 38007, 57474, 68634, 76014, 86211, 102951, 114021, 130913, 172422, 205902, 228042, 258633, 261826, 342063, 392739, 517266, 684126, 785478, 1178217, 2356434, 3534651, 7069302, 10603953, 21207906]

約数ペア:

[(1, 21207906), (2, 10603953), (3, 7069302), (6, 3534651), (9, 2356434), (18, 1178217), (27, 785478), (31, 684126), (41, 517266), (54, 392739), (62, 342063), (81, 261826), (82, 258633), (93, 228042), (103, 205902), (123, 172422), (162, 130913), (186, 114021), (206, 102951), (246, 86211), (279, 76014), (309, 68634), (369, 57474), (558, 38007), (618, 34317), (738, 28737), (837, 25338), (927, 22878), (1107, 19158), (1271, 16686), (1674, 12669), (1854, 11439), (2214, 9579), (2511, 8446), (2542, 8343), (2781, 7626), (3193, 6642), (3321, 6386), (3813, 5562), (4223, 5022)]