20087320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:736

約数の個数: 64

約数和(自身を含む): 50077440

約数和(自身を除く): 29990120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 643, 710, 781, 1286, 1420, 1562, 2572, 2840, 3124, 3215, 3905, 5144, 6248, 6430, 7073, 7810, 12860, 14146, 15620, 25720, 28292, 31240, 35365, 45653, 56584, 70730, 91306, 141460, 182612, 228265, 282920, 365224, 456530, 502183, 913060, 1004366, 1826120, 2008732, 2510915, 4017464, 5021830, 10043660, 20087320]

約数ペア:

[(1, 20087320), (2, 10043660), (4, 5021830), (5, 4017464), (8, 2510915), (10, 2008732), (11, 1826120), (20, 1004366), (22, 913060), (40, 502183), (44, 456530), (55, 365224), (71, 282920), (88, 228265), (110, 182612), (142, 141460), (220, 91306), (284, 70730), (355, 56584), (440, 45653), (568, 35365), (643, 31240), (710, 28292), (781, 25720), (1286, 15620), (1420, 14146), (1562, 12860), (2572, 7810), (2840, 7073), (3124, 6430), (3215, 6248), (3905, 5144)]