77677780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{2203}}^1$

素因数の和:2296

約数の個数: 48

約数和(自身を含む): 171065664

約数和(自身を除く): 93387884

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 410, 430, 820, 860, 1763, 2203, 3526, 4406, 7052, 8812, 8815, 11015, 17630, 22030, 35260, 44060, 90323, 94729, 180646, 189458, 361292, 378916, 451615, 473645, 903230, 947290, 1806460, 1894580, 3883889, 7767778, 15535556, 19419445, 38838890, 77677780]

約数ペア:

[(1, 77677780), (2, 38838890), (4, 19419445), (5, 15535556), (10, 7767778), (20, 3883889), (41, 1894580), (43, 1806460), (82, 947290), (86, 903230), (164, 473645), (172, 451615), (205, 378916), (215, 361292), (410, 189458), (430, 180646), (820, 94729), (860, 90323), (1763, 44060), (2203, 35260), (3526, 22030), (4406, 17630), (7052, 11015), (8812, 8815)]