20262640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{317}}^1$

素因数の和:394

約数の個数: 80

約数和(自身を含む): 51103872

約数和(自身を除く): 30841232

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 47, 68, 80, 85, 94, 136, 170, 188, 235, 272, 317, 340, 376, 470, 634, 680, 752, 799, 940, 1268, 1360, 1585, 1598, 1880, 2536, 3170, 3196, 3760, 3995, 5072, 5389, 6340, 6392, 7990, 10778, 12680, 12784, 14899, 15980, 21556, 25360, 26945, 29798, 31960, 43112, 53890, 59596, 63920, 74495, 86224, 107780, 119192, 148990, 215560, 238384, 253283, 297980, 431120, 506566, 595960, 1013132, 1191920, 1266415, 2026264, 2532830, 4052528, 5065660, 10131320, 20262640]

約数ペア:

[(1, 20262640), (2, 10131320), (4, 5065660), (5, 4052528), (8, 2532830), (10, 2026264), (16, 1266415), (17, 1191920), (20, 1013132), (34, 595960), (40, 506566), (47, 431120), (68, 297980), (80, 253283), (85, 238384), (94, 215560), (136, 148990), (170, 119192), (188, 107780), (235, 86224), (272, 74495), (317, 63920), (340, 59596), (376, 53890), (470, 43112), (634, 31960), (680, 29798), (752, 26945), (799, 25360), (940, 21556), (1268, 15980), (1360, 14899), (1585, 12784), (1598, 12680), (1880, 10778), (2536, 7990), (3170, 6392), (3196, 6340), (3760, 5389), (3995, 5072)]