20042620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{491}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 45708768

約数和(自身を除く): 25666148

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 491, 628, 785, 982, 1570, 1964, 2041, 2455, 3140, 4082, 4910, 6383, 8164, 9820, 10205, 12766, 20410, 25532, 31915, 40820, 63830, 77087, 127660, 154174, 308348, 385435, 770870, 1002131, 1541740, 2004262, 4008524, 5010655, 10021310, 20042620]

約数ペア:

[(1, 20042620), (2, 10021310), (4, 5010655), (5, 4008524), (10, 2004262), (13, 1541740), (20, 1002131), (26, 770870), (52, 385435), (65, 308348), (130, 154174), (157, 127660), (260, 77087), (314, 63830), (491, 40820), (628, 31915), (785, 25532), (982, 20410), (1570, 12766), (1964, 10205), (2041, 9820), (2455, 8164), (3140, 6383), (4082, 4910)]