20171775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1217}}^1$

素因数の和:1260

約数の個数: 48

約数和(自身を含む): 38060064

約数和(自身を除く): 17888289

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1217, 1275, 3315, 3651, 5525, 6085, 15821, 16575, 18255, 20689, 30425, 47463, 62067, 79105, 91275, 103445, 237315, 268957, 310335, 395525, 517225, 806871, 1186575, 1344785, 1551675, 4034355, 6723925, 20171775]

約数ペア:

[(1, 20171775), (3, 6723925), (5, 4034355), (13, 1551675), (15, 1344785), (17, 1186575), (25, 806871), (39, 517225), (51, 395525), (65, 310335), (75, 268957), (85, 237315), (195, 103445), (221, 91275), (255, 79105), (325, 62067), (425, 47463), (663, 30425), (975, 20689), (1105, 18255), (1217, 16575), (1275, 15821), (3315, 6085), (3651, 5525)]