21764620

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7829}}^1$

素因数の和:7977

約数の個数: 24

約数和(自身を含む): 46040400

約数和(自身を除く): 24275780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7829, 15658, 31316, 39145, 78290, 156580, 1088231, 2176462, 4352924, 5441155, 10882310, 21764620]

約数ペア:

[(1, 21764620), (2, 10882310), (4, 5441155), (5, 4352924), (10, 2176462), (20, 1088231), (139, 156580), (278, 78290), (556, 39145), (695, 31316), (1390, 15658), (2780, 7829)]