21539360

素因数分解:

$2^5\times 5^1\times {\mathrm{103}}^1\times {\mathrm{1307}}^1$

素因数の和:1425

約数の個数: 48

約数和(自身を含む): 51420096

約数和(自身を除く): 29880736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 103, 160, 206, 412, 515, 824, 1030, 1307, 1648, 2060, 2614, 3296, 4120, 5228, 6535, 8240, 10456, 13070, 16480, 20912, 26140, 41824, 52280, 104560, 134621, 209120, 269242, 538484, 673105, 1076968, 1346210, 2153936, 2692420, 4307872, 5384840, 10769680, 21539360]

約数ペア:

[(1, 21539360), (2, 10769680), (4, 5384840), (5, 4307872), (8, 2692420), (10, 2153936), (16, 1346210), (20, 1076968), (32, 673105), (40, 538484), (80, 269242), (103, 209120), (160, 134621), (206, 104560), (412, 52280), (515, 41824), (824, 26140), (1030, 20912), (1307, 16480), (1648, 13070), (2060, 10456), (2614, 8240), (3296, 6535), (4120, 5228)]