21013853

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 26853120

約数和(自身を除く): 5839267

約数列:

[1, 7, 17, 41, 59, 73, 119, 287, 413, 511, 697, 1003, 1241, 2419, 2993, 4307, 4879, 7021, 8687, 16933, 20951, 30149, 41123, 50881, 73219, 176587, 287861, 356167, 512533, 1236109, 3001979, 21013853]

約数ペア:

[(1, 21013853), (7, 3001979), (17, 1236109), (41, 512533), (59, 356167), (73, 287861), (119, 176587), (287, 73219), (413, 50881), (511, 41123), (697, 30149), (1003, 20951), (1241, 16933), (2419, 8687), (2993, 7021), (4307, 4879)]