20985400

素因数分解:

$2^3\times 5^2\times {\mathrm{317}}^1\times {\mathrm{331}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 49092840

約数和(自身を除く): 28107440

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 317, 331, 634, 662, 1268, 1324, 1585, 1655, 2536, 2648, 3170, 3310, 6340, 6620, 7925, 8275, 12680, 13240, 15850, 16550, 31700, 33100, 63400, 66200, 104927, 209854, 419708, 524635, 839416, 1049270, 2098540, 2623175, 4197080, 5246350, 10492700, 20985400]

約数ペア:

[(1, 20985400), (2, 10492700), (4, 5246350), (5, 4197080), (8, 2623175), (10, 2098540), (20, 1049270), (25, 839416), (40, 524635), (50, 419708), (100, 209854), (200, 104927), (317, 66200), (331, 63400), (634, 33100), (662, 31700), (1268, 16550), (1324, 15850), (1585, 13240), (1655, 12680), (2536, 8275), (2648, 7925), (3170, 6620), (3310, 6340)]