20787380

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14639}}^1$

素因数の和:14719

約数の個数: 24

約数和(自身を含む): 44271360

約数和(自身を除く): 23483980

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14639, 29278, 58556, 73195, 146390, 292780, 1039369, 2078738, 4157476, 5196845, 10393690, 20787380]

約数ペア:

[(1, 20787380), (2, 10393690), (4, 5196845), (5, 4157476), (10, 2078738), (20, 1039369), (71, 292780), (142, 146390), (284, 73195), (355, 58556), (710, 29278), (1420, 14639)]