18865990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:277

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 21776570

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 79, 110, 130, 143, 158, 167, 286, 334, 395, 715, 790, 835, 869, 1027, 1430, 1670, 1738, 1837, 2054, 2171, 3674, 4342, 4345, 5135, 8690, 9185, 10270, 10855, 11297, 13193, 18370, 21710, 22594, 23881, 26386, 47762, 56485, 65965, 112970, 119405, 131930, 145123, 171509, 238810, 290246, 343018, 725615, 857545, 1451230, 1715090, 1886599, 3773198, 9432995, 18865990]

約数ペア:

[(1, 18865990), (2, 9432995), (5, 3773198), (10, 1886599), (11, 1715090), (13, 1451230), (22, 857545), (26, 725615), (55, 343018), (65, 290246), (79, 238810), (110, 171509), (130, 145123), (143, 131930), (158, 119405), (167, 112970), (286, 65965), (334, 56485), (395, 47762), (715, 26386), (790, 23881), (835, 22594), (869, 21710), (1027, 18370), (1430, 13193), (1670, 11297), (1738, 10855), (1837, 10270), (2054, 9185), (2171, 8690), (3674, 5135), (4342, 4345)]