400120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{1429}}^1$

素因数の和:1447

約数の個数: 32

約数和(自身を含む): 1029600

約数和(自身を除く): 629480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 1429, 2858, 5716, 7145, 10003, 11432, 14290, 20006, 28580, 40012, 50015, 57160, 80024, 100030, 200060, 400120]

約数ペア:

[(1, 400120), (2, 200060), (4, 100030), (5, 80024), (7, 57160), (8, 50015), (10, 40012), (14, 28580), (20, 20006), (28, 14290), (35, 11432), (40, 10003), (56, 7145), (70, 5716), (140, 2858), (280, 1429)]