20127440

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5851}}^1$

素因数の和:5907

約数の個数: 40

約数和(自身を含む): 47892768

約数和(自身を除く): 27765328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5851, 11702, 23404, 29255, 46808, 58510, 93616, 117020, 234040, 251593, 468080, 503186, 1006372, 1257965, 2012744, 2515930, 4025488, 5031860, 10063720, 20127440]

約数ペア:

[(1, 20127440), (2, 10063720), (4, 5031860), (5, 4025488), (8, 2515930), (10, 2012744), (16, 1257965), (20, 1006372), (40, 503186), (43, 468080), (80, 251593), (86, 234040), (172, 117020), (215, 93616), (344, 58510), (430, 46808), (688, 29255), (860, 23404), (1720, 11702), (3440, 5851)]