19645720

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6217}}^1$

素因数の和:6307

約数の個数: 32

約数和(自身を含む): 44769600

約数和(自身を除く): 25123880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6217, 12434, 24868, 31085, 49736, 62170, 124340, 248680, 491143, 982286, 1964572, 2455715, 3929144, 4911430, 9822860, 19645720]

約数ペア:

[(1, 19645720), (2, 9822860), (4, 4911430), (5, 3929144), (8, 2455715), (10, 1964572), (20, 982286), (40, 491143), (79, 248680), (158, 124340), (316, 62170), (395, 49736), (632, 31085), (790, 24868), (1580, 12434), (3160, 6217)]