21497875

素因数分解:

$5^3\times 7^1\times {\mathrm{79}}^1\times {\mathrm{311}}^1$

素因数の和:412

約数の個数: 32

約数和(自身を含む): 31150080

約数和(自身を除く): 9652205

約数列:

[1, 5, 7, 25, 35, 79, 125, 175, 311, 395, 553, 875, 1555, 1975, 2177, 2765, 7775, 9875, 10885, 13825, 24569, 38875, 54425, 69125, 122845, 171983, 272125, 614225, 859915, 3071125, 4299575, 21497875]

約数ペア:

[(1, 21497875), (5, 4299575), (7, 3071125), (25, 859915), (35, 614225), (79, 272125), (125, 171983), (175, 122845), (311, 69125), (395, 54425), (553, 38875), (875, 24569), (1555, 13825), (1975, 10885), (2177, 9875), (2765, 7775)]