21948129

素因数分解:

$3^2\times 7^2\times {\mathrm{157}}^1\times {\mathrm{317}}^1$

素因数の和:494

約数の個数: 36

約数和(自身を含む): 37230804

約数和(自身を除く): 15282675

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 157, 317, 441, 471, 951, 1099, 1413, 2219, 2853, 3297, 6657, 7693, 9891, 15533, 19971, 23079, 46599, 49769, 69237, 139797, 149307, 348383, 447921, 1045149, 2438681, 3135447, 7316043, 21948129]

約数ペア:

[(1, 21948129), (3, 7316043), (7, 3135447), (9, 2438681), (21, 1045149), (49, 447921), (63, 348383), (147, 149307), (157, 139797), (317, 69237), (441, 49769), (471, 46599), (951, 23079), (1099, 19971), (1413, 15533), (2219, 9891), (2853, 7693), (3297, 6657)]