20845040

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3889}}^1$

素因数の和:3969

約数の個数: 40

約数和(自身を含む): 49200720

約数和(自身を除く): 28355680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3889, 5360, 7778, 15556, 19445, 31112, 38890, 62224, 77780, 155560, 260563, 311120, 521126, 1042252, 1302815, 2084504, 2605630, 4169008, 5211260, 10422520, 20845040]

約数ペア:

[(1, 20845040), (2, 10422520), (4, 5211260), (5, 4169008), (8, 2605630), (10, 2084504), (16, 1302815), (20, 1042252), (40, 521126), (67, 311120), (80, 260563), (134, 155560), (268, 77780), (335, 62224), (536, 38890), (670, 31112), (1072, 19445), (1340, 15556), (2680, 7778), (3889, 5360)]