21819790

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{2801}}^1$

素因数の和:2868

約数の個数: 32

約数和(自身を含む): 42366240

約数和(自身を除く): 20546450

約数列:

[1, 2, 5, 10, 19, 38, 41, 82, 95, 190, 205, 410, 779, 1558, 2801, 3895, 5602, 7790, 14005, 28010, 53219, 106438, 114841, 229682, 266095, 532190, 574205, 1148410, 2181979, 4363958, 10909895, 21819790]

約数ペア:

[(1, 21819790), (2, 10909895), (5, 4363958), (10, 2181979), (19, 1148410), (38, 574205), (41, 532190), (82, 266095), (95, 229682), (190, 114841), (205, 106438), (410, 53219), (779, 28010), (1558, 14005), (2801, 7790), (3895, 5602)]