21548709

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{317}}^1$

素因数の和:426

約数の個数: 48

約数和(自身を含む): 38892672

約数和(自身を除く): 17343963

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 83, 91, 117, 249, 273, 317, 581, 747, 819, 951, 1079, 1743, 2219, 2853, 3237, 4121, 5229, 6657, 7553, 9711, 12363, 19971, 22659, 26311, 28847, 37089, 67977, 78933, 86541, 184177, 236799, 259623, 342043, 552531, 1026129, 1657593, 2394301, 3078387, 7182903, 21548709]

約数ペア:

[(1, 21548709), (3, 7182903), (7, 3078387), (9, 2394301), (13, 1657593), (21, 1026129), (39, 552531), (63, 342043), (83, 259623), (91, 236799), (117, 184177), (249, 86541), (273, 78933), (317, 67977), (581, 37089), (747, 28847), (819, 26311), (951, 22659), (1079, 19971), (1743, 12363), (2219, 9711), (2853, 7553), (3237, 6657), (4121, 5229)]