21998501

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{137}}^1$

素因数の和:293

約数の個数: 24

約数和(自身を含む): 26901720

約数和(自身を除く): 4903219

約数列:

[1, 7, 29, 49, 113, 137, 203, 791, 959, 1421, 3277, 3973, 5537, 6713, 15481, 22939, 27811, 108367, 160573, 194677, 448949, 758569, 3142643, 21998501]

約数ペア:

[(1, 21998501), (7, 3142643), (29, 758569), (49, 448949), (113, 194677), (137, 160573), (203, 108367), (791, 27811), (959, 22939), (1421, 15481), (3277, 6713), (3973, 5537)]