20676560

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:316

約数の個数: 80

約数和(自身を含む): 51663360

約数和(自身を除く): 30986800

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 61, 76, 80, 95, 122, 152, 190, 223, 244, 304, 305, 380, 446, 488, 610, 760, 892, 976, 1115, 1159, 1220, 1520, 1784, 2230, 2318, 2440, 3568, 4237, 4460, 4636, 4880, 5795, 8474, 8920, 9272, 11590, 13603, 16948, 17840, 18544, 21185, 23180, 27206, 33896, 42370, 46360, 54412, 67792, 68015, 84740, 92720, 108824, 136030, 169480, 217648, 258457, 272060, 338960, 516914, 544120, 1033828, 1088240, 1292285, 2067656, 2584570, 4135312, 5169140, 10338280, 20676560]

約数ペア:

[(1, 20676560), (2, 10338280), (4, 5169140), (5, 4135312), (8, 2584570), (10, 2067656), (16, 1292285), (19, 1088240), (20, 1033828), (38, 544120), (40, 516914), (61, 338960), (76, 272060), (80, 258457), (95, 217648), (122, 169480), (152, 136030), (190, 108824), (223, 92720), (244, 84740), (304, 68015), (305, 67792), (380, 54412), (446, 46360), (488, 42370), (610, 33896), (760, 27206), (892, 23180), (976, 21185), (1115, 18544), (1159, 17840), (1220, 16948), (1520, 13603), (1784, 11590), (2230, 9272), (2318, 8920), (2440, 8474), (3568, 5795), (4237, 4880), (4460, 4636)]