21102680

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12269}}^1$

素因数の和:12323

約数の個数: 32

約数和(自身を含む): 48589200

約数和(自身を除く): 27486520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12269, 24538, 49076, 61345, 98152, 122690, 245380, 490760, 527567, 1055134, 2110268, 2637835, 4220536, 5275670, 10551340, 21102680]

約数ペア:

[(1, 21102680), (2, 10551340), (4, 5275670), (5, 4220536), (8, 2637835), (10, 2110268), (20, 1055134), (40, 527567), (43, 490760), (86, 245380), (172, 122690), (215, 98152), (344, 61345), (430, 49076), (860, 24538), (1720, 12269)]