20280980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{53}}^2$

素因数の和:153

約数の個数: 54

約数和(自身を含む): 45813726

約数和(自身を除く): 25532746

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 53, 76, 95, 106, 190, 212, 265, 361, 380, 530, 722, 1007, 1060, 1444, 1805, 2014, 2809, 3610, 4028, 5035, 5618, 7220, 10070, 11236, 14045, 19133, 20140, 28090, 38266, 53371, 56180, 76532, 95665, 106742, 191330, 213484, 266855, 382660, 533710, 1014049, 1067420, 2028098, 4056196, 5070245, 10140490, 20280980]

約数ペア:

[(1, 20280980), (2, 10140490), (4, 5070245), (5, 4056196), (10, 2028098), (19, 1067420), (20, 1014049), (38, 533710), (53, 382660), (76, 266855), (95, 213484), (106, 191330), (190, 106742), (212, 95665), (265, 76532), (361, 56180), (380, 53371), (530, 38266), (722, 28090), (1007, 20140), (1060, 19133), (1444, 14045), (1805, 11236), (2014, 10070), (2809, 7220), (3610, 5618), (4028, 5035)]