9890660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{349}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 22638000

約数和(自身を除く): 12747340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 109, 130, 218, 260, 349, 436, 545, 698, 1090, 1396, 1417, 1745, 2180, 2834, 3490, 4537, 5668, 6980, 7085, 9074, 14170, 18148, 22685, 28340, 38041, 45370, 76082, 90740, 152164, 190205, 380410, 494533, 760820, 989066, 1978132, 2472665, 4945330, 9890660]

約数ペア:

[(1, 9890660), (2, 4945330), (4, 2472665), (5, 1978132), (10, 989066), (13, 760820), (20, 494533), (26, 380410), (52, 190205), (65, 152164), (109, 90740), (130, 76082), (218, 45370), (260, 38041), (349, 28340), (436, 22685), (545, 18148), (698, 14170), (1090, 9074), (1396, 7085), (1417, 6980), (1745, 5668), (2180, 4537), (2834, 3490)]