20697620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{587}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 45638208

約数和(自身を除く): 24940588

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 410, 430, 587, 820, 860, 1174, 1763, 2348, 2935, 3526, 5870, 7052, 8815, 11740, 17630, 24067, 25241, 35260, 48134, 50482, 96268, 100964, 120335, 126205, 240670, 252410, 481340, 504820, 1034881, 2069762, 4139524, 5174405, 10348810, 20697620]

約数ペア:

[(1, 20697620), (2, 10348810), (4, 5174405), (5, 4139524), (10, 2069762), (20, 1034881), (41, 504820), (43, 481340), (82, 252410), (86, 240670), (164, 126205), (172, 120335), (205, 100964), (215, 96268), (410, 50482), (430, 48134), (587, 35260), (820, 25241), (860, 24067), (1174, 17630), (1763, 11740), (2348, 8815), (2935, 7052), (3526, 5870)]