21218516

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1493}}^1$

素因数の和:1544

約数の個数: 48

約数和(自身を含む): 45178560

約数和(自身を除く): 23960044

約数列:

[1, 2, 4, 11, 17, 19, 22, 34, 38, 44, 68, 76, 187, 209, 323, 374, 418, 646, 748, 836, 1292, 1493, 2986, 3553, 5972, 7106, 14212, 16423, 25381, 28367, 32846, 50762, 56734, 65692, 101524, 113468, 279191, 312037, 482239, 558382, 624074, 964478, 1116764, 1248148, 1928956, 5304629, 10609258, 21218516]

約数ペア:

[(1, 21218516), (2, 10609258), (4, 5304629), (11, 1928956), (17, 1248148), (19, 1116764), (22, 964478), (34, 624074), (38, 558382), (44, 482239), (68, 312037), (76, 279191), (187, 113468), (209, 101524), (323, 65692), (374, 56734), (418, 50762), (646, 32846), (748, 28367), (836, 25381), (1292, 16423), (1493, 14212), (2986, 7106), (3553, 5972)]