21392860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{2963}}^1$

素因数の和:3010

約数の個数: 36

約数和(自身を含む): 47429928

約数和(自身を除く): 26037068

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 722, 1444, 1805, 2963, 3610, 5926, 7220, 11852, 14815, 29630, 56297, 59260, 112594, 225188, 281485, 562970, 1069643, 1125940, 2139286, 4278572, 5348215, 10696430, 21392860]

約数ペア:

[(1, 21392860), (2, 10696430), (4, 5348215), (5, 4278572), (10, 2139286), (19, 1125940), (20, 1069643), (38, 562970), (76, 281485), (95, 225188), (190, 112594), (361, 59260), (380, 56297), (722, 29630), (1444, 14815), (1805, 11852), (2963, 7220), (3610, 5926)]