21776500

素因数分解:

$2^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{449}}^1$

素因数の和:565

約数の個数: 48

約数和(自身を含む): 48157200

約数和(自身を除く): 26380700

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 97, 100, 125, 194, 250, 388, 449, 485, 500, 898, 970, 1796, 1940, 2245, 2425, 4490, 4850, 8980, 9700, 11225, 12125, 22450, 24250, 43553, 44900, 48500, 56125, 87106, 112250, 174212, 217765, 224500, 435530, 871060, 1088825, 2177650, 4355300, 5444125, 10888250, 21776500]

約数ペア:

[(1, 21776500), (2, 10888250), (4, 5444125), (5, 4355300), (10, 2177650), (20, 1088825), (25, 871060), (50, 435530), (97, 224500), (100, 217765), (125, 174212), (194, 112250), (250, 87106), (388, 56125), (449, 48500), (485, 44900), (500, 43553), (898, 24250), (970, 22450), (1796, 12125), (1940, 11225), (2245, 9700), (2425, 8980), (4490, 4850)]