20984516

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 44499840

約数和(自身を除く): 23515324

約数列:

[1, 2, 4, 7, 14, 28, 29, 43, 58, 86, 116, 172, 203, 301, 406, 601, 602, 812, 1202, 1204, 1247, 2404, 2494, 4207, 4988, 8414, 8729, 16828, 17429, 17458, 25843, 34858, 34916, 51686, 69716, 103372, 122003, 180901, 244006, 361802, 488012, 723604, 749447, 1498894, 2997788, 5246129, 10492258, 20984516]

約数ペア:

[(1, 20984516), (2, 10492258), (4, 5246129), (7, 2997788), (14, 1498894), (28, 749447), (29, 723604), (43, 488012), (58, 361802), (86, 244006), (116, 180901), (172, 122003), (203, 103372), (301, 69716), (406, 51686), (601, 34916), (602, 34858), (812, 25843), (1202, 17458), (1204, 17429), (1247, 16828), (2404, 8729), (2494, 8414), (4207, 4988)]