21263380

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{601}}^1$

素因数の和:700

約数の個数: 48

約数和(自身を含む): 47028240

約数和(自身を除く): 25764860

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 61, 116, 122, 145, 244, 290, 305, 580, 601, 610, 1202, 1220, 1769, 2404, 3005, 3538, 6010, 7076, 8845, 12020, 17429, 17690, 34858, 35380, 36661, 69716, 73322, 87145, 146644, 174290, 183305, 348580, 366610, 733220, 1063169, 2126338, 4252676, 5315845, 10631690, 21263380]

約数ペア:

[(1, 21263380), (2, 10631690), (4, 5315845), (5, 4252676), (10, 2126338), (20, 1063169), (29, 733220), (58, 366610), (61, 348580), (116, 183305), (122, 174290), (145, 146644), (244, 87145), (290, 73322), (305, 69716), (580, 36661), (601, 35380), (610, 34858), (1202, 17690), (1220, 17429), (1769, 12020), (2404, 8845), (3005, 7076), (3538, 6010)]