388400

素因数分解:

$2^4\times 5^2\times {\mathrm{971}}^1$

素因数の和:989

約数の個数: 30

約数和(自身を含む): 934092

約数和(自身を除く): 545692

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 971, 1942, 3884, 4855, 7768, 9710, 15536, 19420, 24275, 38840, 48550, 77680, 97100, 194200, 388400]

約数ペア:

[(1, 388400), (2, 194200), (4, 97100), (5, 77680), (8, 48550), (10, 38840), (16, 24275), (20, 19420), (25, 15536), (40, 9710), (50, 7768), (80, 4855), (100, 3884), (200, 1942), (400, 971)]