20649825

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{1873}}^1$

素因数の和:1903

約数の個数: 54

約数和(自身を含む): 43047654

約数和(自身を除く): 22397829

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 49, 63, 75, 105, 147, 175, 225, 245, 315, 441, 525, 735, 1225, 1575, 1873, 2205, 3675, 5619, 9365, 11025, 13111, 16857, 28095, 39333, 46825, 65555, 84285, 91777, 117999, 140475, 196665, 275331, 327775, 421425, 458885, 589995, 825993, 983325, 1376655, 2294425, 2949975, 4129965, 6883275, 20649825]

約数ペア:

[(1, 20649825), (3, 6883275), (5, 4129965), (7, 2949975), (9, 2294425), (15, 1376655), (21, 983325), (25, 825993), (35, 589995), (45, 458885), (49, 421425), (63, 327775), (75, 275331), (105, 196665), (147, 140475), (175, 117999), (225, 91777), (245, 84285), (315, 65555), (441, 46825), (525, 39333), (735, 28095), (1225, 16857), (1575, 13111), (1873, 11025), (2205, 9365), (3675, 5619)]