425780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{349}}^1$

素因数の和:419

約数の個数: 24

約数和(自身を含む): 911400

約数和(自身を除く): 485620

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 349, 610, 698, 1220, 1396, 1745, 3490, 6980, 21289, 42578, 85156, 106445, 212890, 425780]

約数ペア:

[(1, 425780), (2, 212890), (4, 106445), (5, 85156), (10, 42578), (20, 21289), (61, 6980), (122, 3490), (244, 1745), (305, 1396), (349, 1220), (610, 698)]