21462728

素因数分解:

$2^3\times 7^1\times {\mathrm{61}}^2\times {\mathrm{103}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 47211840

約数和(自身を除く): 25749112

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 61, 103, 122, 206, 244, 412, 427, 488, 721, 824, 854, 1442, 1708, 2884, 3416, 3721, 5768, 6283, 7442, 12566, 14884, 25132, 26047, 29768, 43981, 50264, 52094, 87962, 104188, 175924, 208376, 351848, 383263, 766526, 1533052, 2682841, 3066104, 5365682, 10731364, 21462728]

約数ペア:

[(1, 21462728), (2, 10731364), (4, 5365682), (7, 3066104), (8, 2682841), (14, 1533052), (28, 766526), (56, 383263), (61, 351848), (103, 208376), (122, 175924), (206, 104188), (244, 87962), (412, 52094), (427, 50264), (488, 43981), (721, 29768), (824, 26047), (854, 25132), (1442, 14884), (1708, 12566), (2884, 7442), (3416, 6283), (3721, 5768)]