21383728

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31081}}^1$

素因数の和:31132

約数の個数: 20

約数和(自身を含む): 42395848

約数和(自身を除く): 21012120

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31081, 62162, 124324, 248648, 497296, 1336483, 2672966, 5345932, 10691864, 21383728]

約数ペア:

[(1, 21383728), (2, 10691864), (4, 5345932), (8, 2672966), (16, 1336483), (43, 497296), (86, 248648), (172, 124324), (344, 62162), (688, 31081)]