20928825

素因数分解:

$3^2\times 5^2\times {\mathrm{191}}^1\times {\mathrm{487}}^1$

素因数の和:694

約数の個数: 36

約数和(自身を含む): 37759488

約数和(自身を除く): 16830663

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 191, 225, 487, 573, 955, 1461, 1719, 2435, 2865, 4383, 4775, 7305, 8595, 12175, 14325, 21915, 36525, 42975, 93017, 109575, 279051, 465085, 837153, 1395255, 2325425, 4185765, 6976275, 20928825]

約数ペア:

[(1, 20928825), (3, 6976275), (5, 4185765), (9, 2325425), (15, 1395255), (25, 837153), (45, 465085), (75, 279051), (191, 109575), (225, 93017), (487, 42975), (573, 36525), (955, 21915), (1461, 14325), (1719, 12175), (2435, 8595), (2865, 7305), (4383, 4775)]