20418640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23203}}^1$

素因数の和:23227

約数の個数: 40

約数和(自身を含む): 51791328

約数和(自身を除く): 31372688

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23203, 46406, 92812, 116015, 185624, 232030, 255233, 371248, 464060, 510466, 928120, 1020932, 1276165, 1856240, 2041864, 2552330, 4083728, 5104660, 10209320, 20418640]

約数ペア:

[(1, 20418640), (2, 10209320), (4, 5104660), (5, 4083728), (8, 2552330), (10, 2041864), (11, 1856240), (16, 1276165), (20, 1020932), (22, 928120), (40, 510466), (44, 464060), (55, 371248), (80, 255233), (88, 232030), (110, 185624), (176, 116015), (220, 92812), (440, 46406), (880, 23203)]