28788400

素因数分解:

$2^4\times 5^2\times {\mathrm{71971}}^1$

素因数の和:71989

約数の個数: 30

約数和(自身を含む): 69165092

約数和(自身を除く): 40376692

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 71971, 143942, 287884, 359855, 575768, 719710, 1151536, 1439420, 1799275, 2878840, 3598550, 5757680, 7197100, 14394200, 28788400]

約数ペア:

[(1, 28788400), (2, 14394200), (4, 7197100), (5, 5757680), (8, 3598550), (10, 2878840), (16, 1799275), (20, 1439420), (25, 1151536), (40, 719710), (50, 575768), (80, 359855), (100, 287884), (200, 143942), (400, 71971)]