21446660

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{359}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 25727740

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 103, 116, 145, 206, 290, 359, 412, 515, 580, 718, 1030, 1436, 1795, 2060, 2987, 3590, 5974, 7180, 10411, 11948, 14935, 20822, 29870, 36977, 41644, 52055, 59740, 73954, 104110, 147908, 184885, 208220, 369770, 739540, 1072333, 2144666, 4289332, 5361665, 10723330, 21446660]

約数ペア:

[(1, 21446660), (2, 10723330), (4, 5361665), (5, 4289332), (10, 2144666), (20, 1072333), (29, 739540), (58, 369770), (103, 208220), (116, 184885), (145, 147908), (206, 104110), (290, 73954), (359, 59740), (412, 52055), (515, 41644), (580, 36977), (718, 29870), (1030, 20822), (1436, 14935), (1795, 11948), (2060, 10411), (2987, 7180), (3590, 5974)]