21989036

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{227}}^1\times {\mathrm{397}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 39382896

約数和(自身を除く): 17393860

約数列:

[1, 2, 4, 61, 122, 227, 244, 397, 454, 794, 908, 1588, 13847, 24217, 27694, 48434, 55388, 90119, 96868, 180238, 360476, 5497259, 10994518, 21989036]

約数ペア:

[(1, 21989036), (2, 10994518), (4, 5497259), (61, 360476), (122, 180238), (227, 96868), (244, 90119), (397, 55388), (454, 48434), (794, 27694), (908, 24217), (1588, 13847)]