20788400

素因数分解:

$2^4\times 5^2\times {\mathrm{51971}}^1$

素因数の和:51989

約数の個数: 30

約数和(自身を含む): 49945092

約数和(自身を除く): 29156692

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51971, 103942, 207884, 259855, 415768, 519710, 831536, 1039420, 1299275, 2078840, 2598550, 4157680, 5197100, 10394200, 20788400]

約数ペア:

[(1, 20788400), (2, 10394200), (4, 5197100), (5, 4157680), (8, 2598550), (10, 2078840), (16, 1299275), (20, 1039420), (25, 831536), (40, 519710), (50, 415768), (80, 259855), (100, 207884), (200, 103942), (400, 51971)]