20898140

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14717}}^1$

素因数の和:14797

約数の個数: 24

約数和(自身を含む): 44507232

約数和(自身を除く): 23609092

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14717, 29434, 58868, 73585, 147170, 294340, 1044907, 2089814, 4179628, 5224535, 10449070, 20898140]

約数ペア:

[(1, 20898140), (2, 10449070), (4, 5224535), (5, 4179628), (10, 2089814), (20, 1044907), (71, 294340), (142, 147170), (284, 73585), (355, 58868), (710, 29434), (1420, 14717)]