81962660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{1319}}^1$

素因数の和:1580

約数の個数: 48

約数和(自身を含む): 186278400

約数和(自身を除く): 104315740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 239, 260, 478, 956, 1195, 1319, 2390, 2638, 3107, 4780, 5276, 6214, 6595, 12428, 13190, 15535, 17147, 26380, 31070, 34294, 62140, 68588, 85735, 171470, 315241, 342940, 630482, 1260964, 1576205, 3152410, 4098133, 6304820, 8196266, 16392532, 20490665, 40981330, 81962660]

約数ペア:

[(1, 81962660), (2, 40981330), (4, 20490665), (5, 16392532), (10, 8196266), (13, 6304820), (20, 4098133), (26, 3152410), (52, 1576205), (65, 1260964), (130, 630482), (239, 342940), (260, 315241), (478, 171470), (956, 85735), (1195, 68588), (1319, 62140), (2390, 34294), (2638, 31070), (3107, 26380), (4780, 17147), (5276, 15535), (6214, 13190), (6595, 12428)]