20538040

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30203}}^1$

素因数の和:30231

約数の個数: 32

約数和(自身を含む): 48930480

約数和(自身を除く): 28392440

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30203, 60406, 120812, 151015, 241624, 302030, 513451, 604060, 1026902, 1208120, 2053804, 2567255, 4107608, 5134510, 10269020, 20538040]

約数ペア:

[(1, 20538040), (2, 10269020), (4, 5134510), (5, 4107608), (8, 2567255), (10, 2053804), (17, 1208120), (20, 1026902), (34, 604060), (40, 513451), (68, 302030), (85, 241624), (136, 151015), (170, 120812), (340, 60406), (680, 30203)]