81854220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194891}}^1$

素因数の和:194910

約数の個数: 48

約数和(自身を含む): 261934848

約数和(自身を除く): 180080628

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 194891, 389782, 584673, 779564, 974455, 1169346, 1364237, 1948910, 2338692, 2728474, 2923365, 3897820, 4092711, 5456948, 5846730, 6821185, 8185422, 11693460, 13642370, 16370844, 20463555, 27284740, 40927110, 81854220]

約数ペア:

[(1, 81854220), (2, 40927110), (3, 27284740), (4, 20463555), (5, 16370844), (6, 13642370), (7, 11693460), (10, 8185422), (12, 6821185), (14, 5846730), (15, 5456948), (20, 4092711), (21, 3897820), (28, 2923365), (30, 2728474), (35, 2338692), (42, 1948910), (60, 1364237), (70, 1169346), (84, 974455), (105, 779564), (140, 584673), (210, 389782), (420, 194891)]