21651285

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{431}}^1$

素因数の和:653

約数の個数: 32

約数和(自身を含む): 36951552

約数和(自身を除く): 15300267

約数列:

[1, 3, 5, 15, 17, 51, 85, 197, 255, 431, 591, 985, 1293, 2155, 2955, 3349, 6465, 7327, 10047, 16745, 21981, 36635, 50235, 84907, 109905, 254721, 424535, 1273605, 1443419, 4330257, 7217095, 21651285]

約数ペア:

[(1, 21651285), (3, 7217095), (5, 4330257), (15, 1443419), (17, 1273605), (51, 424535), (85, 254721), (197, 109905), (255, 84907), (431, 50235), (591, 36635), (985, 21981), (1293, 16745), (2155, 10047), (2955, 7327), (3349, 6465)]