21440860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5281}}^1$

素因数の和:5326

約数の個数: 48

約数和(自身を含む): 53242560

約数和(自身を除く): 31801700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5281, 10562, 21124, 26405, 36967, 52810, 73934, 105620, 147868, 153149, 184835, 306298, 369670, 612596, 739340, 765745, 1072043, 1531490, 2144086, 3062980, 4288172, 5360215, 10720430, 21440860]

約数ペア:

[(1, 21440860), (2, 10720430), (4, 5360215), (5, 4288172), (7, 3062980), (10, 2144086), (14, 1531490), (20, 1072043), (28, 765745), (29, 739340), (35, 612596), (58, 369670), (70, 306298), (116, 184835), (140, 153149), (145, 147868), (203, 105620), (290, 73934), (406, 52810), (580, 36967), (812, 26405), (1015, 21124), (2030, 10562), (4060, 5281)]