78407820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{661}}^1$

素因数の和:1335

約数の個数: 72

約数和(自身を含む): 238558320

約数和(自身を除く): 160150500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 659, 661, 1318, 1322, 1977, 1983, 2636, 2644, 3295, 3305, 3954, 3966, 5931, 5949, 6590, 6610, 7908, 7932, 9885, 9915, 11862, 11898, 13180, 13220, 19770, 19830, 23724, 23796, 29655, 29745, 39540, 39660, 59310, 59490, 118620, 118980, 435599, 871198, 1306797, 1742396, 2177995, 2613594, 3920391, 4355990, 5227188, 6533985, 7840782, 8711980, 13067970, 15681564, 19601955, 26135940, 39203910, 78407820]

約数ペア:

[(1, 78407820), (2, 39203910), (3, 26135940), (4, 19601955), (5, 15681564), (6, 13067970), (9, 8711980), (10, 7840782), (12, 6533985), (15, 5227188), (18, 4355990), (20, 3920391), (30, 2613594), (36, 2177995), (45, 1742396), (60, 1306797), (90, 871198), (180, 435599), (659, 118980), (661, 118620), (1318, 59490), (1322, 59310), (1977, 39660), (1983, 39540), (2636, 29745), (2644, 29655), (3295, 23796), (3305, 23724), (3954, 19830), (3966, 19770), (5931, 13220), (5949, 13180), (6590, 11898), (6610, 11862), (7908, 9915), (7932, 9885)]