20649675

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 36882560

約数和(自身を除く): 16232885

約数列:

[1, 3, 5, 15, 19, 25, 43, 57, 75, 95, 129, 215, 285, 337, 475, 645, 817, 1011, 1075, 1425, 1685, 2451, 3225, 4085, 5055, 6403, 8425, 12255, 14491, 19209, 20425, 25275, 32015, 43473, 61275, 72455, 96045, 160075, 217365, 275329, 362275, 480225, 825987, 1086825, 1376645, 4129935, 6883225, 20649675]

約数ペア:

[(1, 20649675), (3, 6883225), (5, 4129935), (15, 1376645), (19, 1086825), (25, 825987), (43, 480225), (57, 362275), (75, 275329), (95, 217365), (129, 160075), (215, 96045), (285, 72455), (337, 61275), (475, 43473), (645, 32015), (817, 25275), (1011, 20425), (1075, 19209), (1425, 14491), (1685, 12255), (2451, 8425), (3225, 6403), (4085, 5055)]