21014775

素因数分解:

$3^3\times 5^2\times {\mathrm{163}}^1\times {\mathrm{191}}^1$

素因数の和:373

約数の個数: 48

約数和(自身を含む): 39045120

約数和(自身を除く): 18030345

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 163, 191, 225, 489, 573, 675, 815, 955, 1467, 1719, 2445, 2865, 4075, 4401, 4775, 5157, 7335, 8595, 12225, 14325, 22005, 25785, 31133, 36675, 42975, 93399, 110025, 128925, 155665, 280197, 466995, 778325, 840591, 1400985, 2334975, 4202955, 7004925, 21014775]

約数ペア:

[(1, 21014775), (3, 7004925), (5, 4202955), (9, 2334975), (15, 1400985), (25, 840591), (27, 778325), (45, 466995), (75, 280197), (135, 155665), (163, 128925), (191, 110025), (225, 93399), (489, 42975), (573, 36675), (675, 31133), (815, 25785), (955, 22005), (1467, 14325), (1719, 12225), (2445, 8595), (2865, 7335), (4075, 5157), (4401, 4775)]