81006980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{223}}^1\times {\mathrm{443}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 175440384

約数和(自身を除く): 94433404

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 223, 410, 443, 446, 820, 886, 892, 1115, 1772, 2215, 2230, 4430, 4460, 8860, 9143, 18163, 18286, 36326, 36572, 45715, 72652, 90815, 91430, 98789, 181630, 182860, 197578, 363260, 395156, 493945, 987890, 1975780, 4050349, 8100698, 16201396, 20251745, 40503490, 81006980]

約数ペア:

[(1, 81006980), (2, 40503490), (4, 20251745), (5, 16201396), (10, 8100698), (20, 4050349), (41, 1975780), (82, 987890), (164, 493945), (205, 395156), (223, 363260), (410, 197578), (443, 182860), (446, 181630), (820, 98789), (886, 91430), (892, 90815), (1115, 72652), (1772, 45715), (2215, 36572), (2230, 36326), (4430, 18286), (4460, 18163), (8860, 9143)]