20398480

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2383}}^1$

素因数の和:2503

約数の個数: 40

約数和(自身を含む): 47889792

約数和(自身を除く): 27491312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2383, 4280, 4766, 8560, 9532, 11915, 19064, 23830, 38128, 47660, 95320, 190640, 254981, 509962, 1019924, 1274905, 2039848, 2549810, 4079696, 5099620, 10199240, 20398480]

約数ペア:

[(1, 20398480), (2, 10199240), (4, 5099620), (5, 4079696), (8, 2549810), (10, 2039848), (16, 1274905), (20, 1019924), (40, 509962), (80, 254981), (107, 190640), (214, 95320), (428, 47660), (535, 38128), (856, 23830), (1070, 19064), (1712, 11915), (2140, 9532), (2383, 8560), (4280, 4766)]