2891320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^2\times {\mathrm{43}}^1$

素因数の和:136

約数の個数: 48

約数和(自身を含む): 6823080

約数和(自身を除く): 3931760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 43, 82, 86, 164, 172, 205, 215, 328, 344, 410, 430, 820, 860, 1640, 1681, 1720, 1763, 3362, 3526, 6724, 7052, 8405, 8815, 13448, 14104, 16810, 17630, 33620, 35260, 67240, 70520, 72283, 144566, 289132, 361415, 578264, 722830, 1445660, 2891320]

約数ペア:

[(1, 2891320), (2, 1445660), (4, 722830), (5, 578264), (8, 361415), (10, 289132), (20, 144566), (40, 72283), (41, 70520), (43, 67240), (82, 35260), (86, 33620), (164, 17630), (172, 16810), (205, 14104), (215, 13448), (328, 8815), (344, 8405), (410, 7052), (430, 6724), (820, 3526), (860, 3362), (1640, 1763), (1681, 1720)]