21523005

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:295

約数の個数: 72

約数和(自身を含む): 44602272

約数和(自身を除く): 23079267

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 49, 63, 105, 129, 147, 215, 227, 245, 301, 315, 387, 441, 645, 681, 735, 903, 1135, 1505, 1589, 1935, 2043, 2107, 2205, 2709, 3405, 4515, 4767, 6321, 7945, 9761, 10215, 10535, 11123, 13545, 14301, 18963, 23835, 29283, 31605, 33369, 48805, 55615, 68327, 71505, 87849, 94815, 100107, 146415, 166845, 204981, 341635, 439245, 478289, 500535, 614943, 1024905, 1434867, 2391445, 3074715, 4304601, 7174335, 21523005]

約数ペア:

[(1, 21523005), (3, 7174335), (5, 4304601), (7, 3074715), (9, 2391445), (15, 1434867), (21, 1024905), (35, 614943), (43, 500535), (45, 478289), (49, 439245), (63, 341635), (105, 204981), (129, 166845), (147, 146415), (215, 100107), (227, 94815), (245, 87849), (301, 71505), (315, 68327), (387, 55615), (441, 48805), (645, 33369), (681, 31605), (735, 29283), (903, 23835), (1135, 18963), (1505, 14301), (1589, 13545), (1935, 11123), (2043, 10535), (2107, 10215), (2205, 9761), (2709, 7945), (3405, 6321), (4515, 4767)]