128881655

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 198374400

約数和(自身を除く): 69492745

約数列:

[1, 5, 7, 19, 29, 35, 41, 95, 133, 145, 163, 203, 205, 287, 551, 665, 779, 815, 1015, 1141, 1189, 1435, 2755, 3097, 3857, 3895, 4727, 5453, 5705, 5945, 6683, 8323, 15485, 19285, 21679, 22591, 23635, 27265, 33089, 33415, 41615, 46781, 89813, 108395, 112955, 126977, 158137, 165445, 193807, 233905, 449065, 628691, 634885, 790685, 888839, 969035, 1356649, 3143455, 3682333, 4444195, 6783245, 18411665, 25776331, 128881655]

約数ペア:

[(1, 128881655), (5, 25776331), (7, 18411665), (19, 6783245), (29, 4444195), (35, 3682333), (41, 3143455), (95, 1356649), (133, 969035), (145, 888839), (163, 790685), (203, 634885), (205, 628691), (287, 449065), (551, 233905), (665, 193807), (779, 165445), (815, 158137), (1015, 126977), (1141, 112955), (1189, 108395), (1435, 89813), (2755, 46781), (3097, 41615), (3857, 33415), (3895, 33089), (4727, 27265), (5453, 23635), (5705, 22591), (5945, 21679), (6683, 19285), (8323, 15485)]