21605710

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{3907}}^1$

素因数の和:4000

約数の個数: 32

約数和(自身を含む): 45020160

約数和(自身を除く): 23414450

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 79, 158, 395, 553, 790, 1106, 2765, 3907, 5530, 7814, 19535, 27349, 39070, 54698, 136745, 273490, 308653, 617306, 1543265, 2160571, 3086530, 4321142, 10802855, 21605710]

約数ペア:

[(1, 21605710), (2, 10802855), (5, 4321142), (7, 3086530), (10, 2160571), (14, 1543265), (35, 617306), (70, 308653), (79, 273490), (158, 136745), (395, 54698), (553, 39070), (790, 27349), (1106, 19535), (2765, 7814), (3907, 5530)]