21689108

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{691}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 46502400

約数和(自身を除く): 24813292

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 59, 76, 118, 133, 236, 266, 413, 532, 691, 826, 1121, 1382, 1652, 2242, 2764, 4484, 4837, 7847, 9674, 13129, 15694, 19348, 26258, 31388, 40769, 52516, 81538, 91903, 163076, 183806, 285383, 367612, 570766, 774611, 1141532, 1549222, 3098444, 5422277, 10844554, 21689108]

約数ペア:

[(1, 21689108), (2, 10844554), (4, 5422277), (7, 3098444), (14, 1549222), (19, 1141532), (28, 774611), (38, 570766), (59, 367612), (76, 285383), (118, 183806), (133, 163076), (236, 91903), (266, 81538), (413, 52516), (532, 40769), (691, 31388), (826, 26258), (1121, 19348), (1382, 15694), (1652, 13129), (2242, 9674), (2764, 7847), (4484, 4837)]