21565360

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6269}}^1$

素因数の和:6325

約数の個数: 40

約数和(自身を含む): 51313680

約数和(自身を除く): 29748320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6269, 12538, 25076, 31345, 50152, 62690, 100304, 125380, 250760, 269567, 501520, 539134, 1078268, 1347835, 2156536, 2695670, 4313072, 5391340, 10782680, 21565360]

約数ペア:

[(1, 21565360), (2, 10782680), (4, 5391340), (5, 4313072), (8, 2695670), (10, 2156536), (16, 1347835), (20, 1078268), (40, 539134), (43, 501520), (80, 269567), (86, 250760), (172, 125380), (215, 100304), (344, 62690), (430, 50152), (688, 31345), (860, 25076), (1720, 12538), (3440, 6269)]