21621915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{827}}^1$

素因数の和:928

約数の個数: 48

約数和(自身を含む): 43400448

約数和(自身を除く): 21778533

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 83, 105, 249, 315, 415, 581, 747, 827, 1245, 1743, 2481, 2905, 3735, 4135, 5229, 5789, 7443, 8715, 12405, 17367, 26145, 28945, 37215, 52101, 68641, 86835, 205923, 260505, 343205, 480487, 617769, 1029615, 1441461, 2402435, 3088845, 4324383, 7207305, 21621915]

約数ペア:

[(1, 21621915), (3, 7207305), (5, 4324383), (7, 3088845), (9, 2402435), (15, 1441461), (21, 1029615), (35, 617769), (45, 480487), (63, 343205), (83, 260505), (105, 205923), (249, 86835), (315, 68641), (415, 52101), (581, 37215), (747, 28945), (827, 26145), (1245, 17367), (1743, 12405), (2481, 8715), (2905, 7443), (3735, 5789), (4135, 5229)]