21805425

素因数分解:

$3^2\times 5^2\times {\mathrm{199}}^1\times {\mathrm{487}}^1$

素因数の和:702

約数の個数: 36

約数和(自身を含む): 39332800

約数和(自身を除く): 17527375

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 199, 225, 487, 597, 995, 1461, 1791, 2435, 2985, 4383, 4975, 7305, 8955, 12175, 14925, 21915, 36525, 44775, 96913, 109575, 290739, 484565, 872217, 1453695, 2422825, 4361085, 7268475, 21805425]

約数ペア:

[(1, 21805425), (3, 7268475), (5, 4361085), (9, 2422825), (15, 1453695), (25, 872217), (45, 484565), (75, 290739), (199, 109575), (225, 96913), (487, 44775), (597, 36525), (995, 21915), (1461, 14925), (1791, 12175), (2435, 8955), (2985, 7305), (4383, 4975)]