20431460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7681}}^1$

素因数の和:7716

約数の個数: 48

約数和(自身を含む): 51623040

約数和(自身を除く): 31191580

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7681, 15362, 30724, 38405, 53767, 76810, 107534, 145939, 153620, 215068, 268835, 291878, 537670, 583756, 729695, 1021573, 1075340, 1459390, 2043146, 2918780, 4086292, 5107865, 10215730, 20431460]

約数ペア:

[(1, 20431460), (2, 10215730), (4, 5107865), (5, 4086292), (7, 2918780), (10, 2043146), (14, 1459390), (19, 1075340), (20, 1021573), (28, 729695), (35, 583756), (38, 537670), (70, 291878), (76, 268835), (95, 215068), (133, 153620), (140, 145939), (190, 107534), (266, 76810), (380, 53767), (532, 38405), (665, 30724), (1330, 15362), (2660, 7681)]