21274160

素因数分解:

$2^4\times 5^1\times {\mathrm{431}}^1\times {\mathrm{617}}^1$

素因数の和:1061

約数の個数: 40

約数和(自身を含む): 49657536

約数和(自身を除く): 28383376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 431, 617, 862, 1234, 1724, 2155, 2468, 3085, 3448, 4310, 4936, 6170, 6896, 8620, 9872, 12340, 17240, 24680, 34480, 49360, 265927, 531854, 1063708, 1329635, 2127416, 2659270, 4254832, 5318540, 10637080, 21274160]

約数ペア:

[(1, 21274160), (2, 10637080), (4, 5318540), (5, 4254832), (8, 2659270), (10, 2127416), (16, 1329635), (20, 1063708), (40, 531854), (80, 265927), (431, 49360), (617, 34480), (862, 24680), (1234, 17240), (1724, 12340), (2155, 9872), (2468, 8620), (3085, 6896), (3448, 6170), (4310, 4936)]