21311480

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3833}}^1$

素因数の和:3983

約数の個数: 32

約数和(自身を含む): 48308400

約数和(自身を除く): 26996920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3833, 5560, 7666, 15332, 19165, 30664, 38330, 76660, 153320, 532787, 1065574, 2131148, 2663935, 4262296, 5327870, 10655740, 21311480]

約数ペア:

[(1, 21311480), (2, 10655740), (4, 5327870), (5, 4262296), (8, 2663935), (10, 2131148), (20, 1065574), (40, 532787), (139, 153320), (278, 76660), (556, 38330), (695, 30664), (1112, 19165), (1390, 15332), (2780, 7666), (3833, 5560)]