19920825

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 38301120

約数和(自身を除く): 18380295

約数列:

[1, 3, 5, 9, 15, 25, 29, 43, 45, 71, 75, 87, 129, 145, 213, 215, 225, 261, 355, 387, 435, 639, 645, 725, 1065, 1075, 1247, 1305, 1775, 1935, 2059, 2175, 3053, 3195, 3225, 3741, 5325, 6177, 6235, 6525, 9159, 9675, 10295, 11223, 15265, 15975, 18531, 18705, 27477, 30885, 31175, 45795, 51475, 56115, 76325, 88537, 92655, 93525, 137385, 154425, 228975, 265611, 280575, 442685, 463275, 686925, 796833, 1328055, 2213425, 3984165, 6640275, 19920825]

約数ペア:

[(1, 19920825), (3, 6640275), (5, 3984165), (9, 2213425), (15, 1328055), (25, 796833), (29, 686925), (43, 463275), (45, 442685), (71, 280575), (75, 265611), (87, 228975), (129, 154425), (145, 137385), (213, 93525), (215, 92655), (225, 88537), (261, 76325), (355, 56115), (387, 51475), (435, 45795), (639, 31175), (645, 30885), (725, 27477), (1065, 18705), (1075, 18531), (1247, 15975), (1305, 15265), (1775, 11223), (1935, 10295), (2059, 9675), (2175, 9159), (3053, 6525), (3195, 6235), (3225, 6177), (3741, 5325)]