80782780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{1979}}^1$

素因数の和:2158

約数の個数: 48

約数和(自身を含む): 183949920

約数和(自身を除く): 103167140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 628, 785, 1570, 1979, 2041, 3140, 3958, 4082, 7916, 8164, 9895, 10205, 19790, 20410, 25727, 39580, 40820, 51454, 102908, 128635, 257270, 310703, 514540, 621406, 1242812, 1553515, 3107030, 4039139, 6214060, 8078278, 16156556, 20195695, 40391390, 80782780]

約数ペア:

[(1, 80782780), (2, 40391390), (4, 20195695), (5, 16156556), (10, 8078278), (13, 6214060), (20, 4039139), (26, 3107030), (52, 1553515), (65, 1242812), (130, 621406), (157, 514540), (260, 310703), (314, 257270), (628, 128635), (785, 102908), (1570, 51454), (1979, 40820), (2041, 39580), (3140, 25727), (3958, 20410), (4082, 19790), (7916, 10205), (8164, 9895)]