21992120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{1523}}^1$

素因数の和:1572

約数の個数: 48

約数和(自身を含む): 52257960

約数和(自身を除く): 30265840

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 361, 380, 722, 760, 1444, 1523, 1805, 2888, 3046, 3610, 6092, 7220, 7615, 12184, 14440, 15230, 28937, 30460, 57874, 60920, 115748, 144685, 231496, 289370, 549803, 578740, 1099606, 1157480, 2199212, 2749015, 4398424, 5498030, 10996060, 21992120]

約数ペア:

[(1, 21992120), (2, 10996060), (4, 5498030), (5, 4398424), (8, 2749015), (10, 2199212), (19, 1157480), (20, 1099606), (38, 578740), (40, 549803), (76, 289370), (95, 231496), (152, 144685), (190, 115748), (361, 60920), (380, 57874), (722, 30460), (760, 28937), (1444, 15230), (1523, 14440), (1805, 12184), (2888, 7615), (3046, 7220), (3610, 6092)]