720278540

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1\times {\mathrm{2377}}^1$

素因数の和:2634

約数の個数: 48

約数和(自身を含む): 1538090400

約数和(自身を除く): 817811860

約数列:

[1, 2, 4, 5, 10, 20, 109, 139, 218, 278, 436, 545, 556, 695, 1090, 1390, 2180, 2377, 2780, 4754, 9508, 11885, 15151, 23770, 30302, 47540, 60604, 75755, 151510, 259093, 303020, 330403, 518186, 660806, 1036372, 1295465, 1321612, 1652015, 2590930, 3304030, 5181860, 6608060, 36013927, 72027854, 144055708, 180069635, 360139270, 720278540]

約数ペア:

[(1, 720278540), (2, 360139270), (4, 180069635), (5, 144055708), (10, 72027854), (20, 36013927), (109, 6608060), (139, 5181860), (218, 3304030), (278, 2590930), (436, 1652015), (545, 1321612), (556, 1295465), (695, 1036372), (1090, 660806), (1390, 518186), (2180, 330403), (2377, 303020), (2780, 259093), (4754, 151510), (9508, 75755), (11885, 60604), (15151, 47540), (23770, 30302)]