20218280

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{719}}^1$

素因数の和:786

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 29029720

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 37, 38, 40, 74, 76, 95, 148, 152, 185, 190, 296, 370, 380, 703, 719, 740, 760, 1406, 1438, 1480, 2812, 2876, 3515, 3595, 5624, 5752, 7030, 7190, 13661, 14060, 14380, 26603, 27322, 28120, 28760, 53206, 54644, 68305, 106412, 109288, 133015, 136610, 212824, 266030, 273220, 505457, 532060, 546440, 1010914, 1064120, 2021828, 2527285, 4043656, 5054570, 10109140, 20218280]

約数ペア:

[(1, 20218280), (2, 10109140), (4, 5054570), (5, 4043656), (8, 2527285), (10, 2021828), (19, 1064120), (20, 1010914), (37, 546440), (38, 532060), (40, 505457), (74, 273220), (76, 266030), (95, 212824), (148, 136610), (152, 133015), (185, 109288), (190, 106412), (296, 68305), (370, 54644), (380, 53206), (703, 28760), (719, 28120), (740, 27322), (760, 26603), (1406, 14380), (1438, 14060), (1480, 13661), (2812, 7190), (2876, 7030), (3515, 5752), (3595, 5624)]