20642800

素因数分解:

$2^4\times 5^2\times {\mathrm{51607}}^1$

素因数の和:51625

約数の個数: 30

約数和(自身を含む): 49595288

約数和(自身を除く): 28952488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51607, 103214, 206428, 258035, 412856, 516070, 825712, 1032140, 1290175, 2064280, 2580350, 4128560, 5160700, 10321400, 20642800]

約数ペア:

[(1, 20642800), (2, 10321400), (4, 5160700), (5, 4128560), (8, 2580350), (10, 2064280), (16, 1290175), (20, 1032140), (25, 825712), (40, 516070), (50, 412856), (80, 258035), (100, 206428), (200, 103214), (400, 51607)]