1290985880

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{311}}^1\times {\mathrm{661}}^1$

素因数の和:1140

約数の個数: 64

約数和(自身を含む): 2937055680

約数和(自身を除く): 1646069800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 311, 314, 622, 628, 661, 785, 1244, 1256, 1322, 1555, 1570, 2488, 2644, 3110, 3140, 3305, 5288, 6220, 6280, 6610, 12440, 13220, 26440, 48827, 97654, 103777, 195308, 205571, 207554, 244135, 390616, 411142, 415108, 488270, 518885, 822284, 830216, 976540, 1027855, 1037770, 1644568, 1953080, 2055710, 2075540, 4111420, 4151080, 8222840, 32274647, 64549294, 129098588, 161373235, 258197176, 322746470, 645492940, 1290985880]

約数ペア:

[(1, 1290985880), (2, 645492940), (4, 322746470), (5, 258197176), (8, 161373235), (10, 129098588), (20, 64549294), (40, 32274647), (157, 8222840), (311, 4151080), (314, 4111420), (622, 2075540), (628, 2055710), (661, 1953080), (785, 1644568), (1244, 1037770), (1256, 1027855), (1322, 976540), (1555, 830216), (1570, 822284), (2488, 518885), (2644, 488270), (3110, 415108), (3140, 411142), (3305, 390616), (5288, 244135), (6220, 207554), (6280, 205571), (6610, 195308), (12440, 103777), (13220, 97654), (26440, 48827)]