21397670

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{1279}}^1$

素因数の和:1532

約数の個数: 32

約数和(自身を含む): 44236800

約数和(自身を除く): 22839130

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 239, 478, 1195, 1279, 1673, 2390, 2558, 3346, 6395, 8365, 8953, 12790, 16730, 17906, 44765, 89530, 305681, 611362, 1528405, 2139767, 3056810, 4279534, 10698835, 21397670]

約数ペア:

[(1, 21397670), (2, 10698835), (5, 4279534), (7, 3056810), (10, 2139767), (14, 1528405), (35, 611362), (70, 305681), (239, 89530), (478, 44765), (1195, 17906), (1279, 16730), (1673, 12790), (2390, 8953), (2558, 8365), (3346, 6395)]