21497775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1297}}^1$

素因数の和:1340

約数の個数: 48

約数和(自身を含む): 40559904

約数和(自身を除く): 19062129

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1275, 1297, 3315, 3891, 5525, 6485, 16575, 16861, 19455, 22049, 32425, 50583, 66147, 84305, 97275, 110245, 252915, 286637, 330735, 421525, 551225, 859911, 1264575, 1433185, 1653675, 4299555, 7165925, 21497775]

約数ペア:

[(1, 21497775), (3, 7165925), (5, 4299555), (13, 1653675), (15, 1433185), (17, 1264575), (25, 859911), (39, 551225), (51, 421525), (65, 330735), (75, 286637), (85, 252915), (195, 110245), (221, 97275), (255, 84305), (325, 66147), (425, 50583), (663, 32425), (975, 22049), (1105, 19455), (1275, 16861), (1297, 16575), (3315, 6485), (3891, 5525)]