81781040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{467}}^1$

素因数の和:690

約数の個数: 80

約数和(自身を含む): 208915200

約数和(自身を除く): 127134160

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 199, 220, 398, 440, 467, 796, 880, 934, 995, 1592, 1868, 1990, 2189, 2335, 3184, 3736, 3980, 4378, 4670, 5137, 7472, 7960, 8756, 9340, 10274, 10945, 15920, 17512, 18680, 20548, 21890, 25685, 35024, 37360, 41096, 43780, 51370, 82192, 87560, 92933, 102740, 175120, 185866, 205480, 371732, 410960, 464665, 743464, 929330, 1022263, 1486928, 1858660, 2044526, 3717320, 4089052, 5111315, 7434640, 8178104, 10222630, 16356208, 20445260, 40890520, 81781040]

約数ペア:

[(1, 81781040), (2, 40890520), (4, 20445260), (5, 16356208), (8, 10222630), (10, 8178104), (11, 7434640), (16, 5111315), (20, 4089052), (22, 3717320), (40, 2044526), (44, 1858660), (55, 1486928), (80, 1022263), (88, 929330), (110, 743464), (176, 464665), (199, 410960), (220, 371732), (398, 205480), (440, 185866), (467, 175120), (796, 102740), (880, 92933), (934, 87560), (995, 82192), (1592, 51370), (1868, 43780), (1990, 41096), (2189, 37360), (2335, 35024), (3184, 25685), (3736, 21890), (3980, 20548), (4378, 18680), (4670, 17512), (5137, 15920), (7472, 10945), (7960, 10274), (8756, 9340)]