21220199

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:120

約数の個数: 64

約数和(自身を含む): 31933440

約数和(自身を除く): 10713241

約数列:

[1, 7, 11, 13, 17, 29, 43, 77, 91, 119, 143, 187, 203, 221, 301, 319, 377, 473, 493, 559, 731, 1001, 1247, 1309, 1547, 2233, 2431, 2639, 3311, 3451, 3913, 4147, 5117, 5423, 6149, 6409, 8041, 8729, 9503, 13717, 16211, 17017, 21199, 29029, 37961, 43043, 44863, 56287, 66521, 70499, 96019, 104533, 113477, 148393, 178321, 233189, 275587, 493493, 731731, 1248247, 1632323, 1929109, 3031457, 21220199]

約数ペア:

[(1, 21220199), (7, 3031457), (11, 1929109), (13, 1632323), (17, 1248247), (29, 731731), (43, 493493), (77, 275587), (91, 233189), (119, 178321), (143, 148393), (187, 113477), (203, 104533), (221, 96019), (301, 70499), (319, 66521), (377, 56287), (473, 44863), (493, 43043), (559, 37961), (731, 29029), (1001, 21199), (1247, 17017), (1309, 16211), (1547, 13717), (2233, 9503), (2431, 8729), (2639, 8041), (3311, 6409), (3451, 6149), (3913, 5423), (4147, 5117)]