21138225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{281}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 37765440

約数和(自身を除く): 16627215

約数列:

[1, 3, 5, 15, 17, 25, 51, 59, 75, 85, 177, 255, 281, 295, 425, 843, 885, 1003, 1275, 1405, 1475, 3009, 4215, 4425, 4777, 5015, 7025, 14331, 15045, 16579, 21075, 23885, 25075, 49737, 71655, 75225, 82895, 119425, 248685, 281843, 358275, 414475, 845529, 1243425, 1409215, 4227645, 7046075, 21138225]

約数ペア:

[(1, 21138225), (3, 7046075), (5, 4227645), (15, 1409215), (17, 1243425), (25, 845529), (51, 414475), (59, 358275), (75, 281843), (85, 248685), (177, 119425), (255, 82895), (281, 75225), (295, 71655), (425, 49737), (843, 25075), (885, 23885), (1003, 21075), (1275, 16579), (1405, 15045), (1475, 14331), (3009, 7025), (4215, 5015), (4425, 4777)]