21061725

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16519}}^1$

素因数の和:16549

約数の個数: 24

約数和(自身を含む): 36872640

約数和(自身を除く): 15810915

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16519, 49557, 82595, 247785, 280823, 412975, 842469, 1238925, 1404115, 4212345, 7020575, 21061725]

約数ペア:

[(1, 21061725), (3, 7020575), (5, 4212345), (15, 1404115), (17, 1238925), (25, 842469), (51, 412975), (75, 280823), (85, 247785), (255, 82595), (425, 49557), (1275, 16519)]