21245690

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{1201}}^1$

素因数の和:1298

約数の個数: 32

約数和(自身を含む): 40242960

約数和(自身を除く): 18997270

約数列:

[1, 2, 5, 10, 29, 58, 61, 122, 145, 290, 305, 610, 1201, 1769, 2402, 3538, 6005, 8845, 12010, 17690, 34829, 69658, 73261, 146522, 174145, 348290, 366305, 732610, 2124569, 4249138, 10622845, 21245690]

約数ペア:

[(1, 21245690), (2, 10622845), (5, 4249138), (10, 2124569), (29, 732610), (58, 366305), (61, 348290), (122, 174145), (145, 146522), (290, 73261), (305, 69658), (610, 34829), (1201, 17690), (1769, 12010), (2402, 8845), (3538, 6005)]