128488400

素因数分解:

$2^4\times 5^2\times {\mathrm{321221}}^1$

素因数の和:321239

約数の個数: 30

約数和(自身を含む): 308694342

約数和(自身を除く): 180205942

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 321221, 642442, 1284884, 1606105, 2569768, 3212210, 5139536, 6424420, 8030525, 12848840, 16061050, 25697680, 32122100, 64244200, 128488400]

約数ペア:

[(1, 128488400), (2, 64244200), (4, 32122100), (5, 25697680), (8, 16061050), (10, 12848840), (16, 8030525), (20, 6424420), (25, 5139536), (40, 3212210), (50, 2569768), (80, 1606105), (100, 1284884), (200, 642442), (400, 321221)]