20661075

素因数分解:

$3^5\times 5^2\times {\mathrm{19}}^1\times {\mathrm{179}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 40622400

約数和(自身を除く): 19961325

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 81, 95, 135, 171, 179, 225, 243, 285, 405, 475, 513, 537, 675, 855, 895, 1215, 1425, 1539, 1611, 2025, 2565, 2685, 3401, 4275, 4475, 4617, 4833, 6075, 7695, 8055, 10203, 12825, 13425, 14499, 17005, 23085, 24165, 30609, 38475, 40275, 43497, 51015, 72495, 85025, 91827, 115425, 120825, 153045, 217485, 255075, 275481, 362475, 459135, 765225, 826443, 1087425, 1377405, 2295675, 4132215, 6887025, 20661075]

約数ペア:

[(1, 20661075), (3, 6887025), (5, 4132215), (9, 2295675), (15, 1377405), (19, 1087425), (25, 826443), (27, 765225), (45, 459135), (57, 362475), (75, 275481), (81, 255075), (95, 217485), (135, 153045), (171, 120825), (179, 115425), (225, 91827), (243, 85025), (285, 72495), (405, 51015), (475, 43497), (513, 40275), (537, 38475), (675, 30609), (855, 24165), (895, 23085), (1215, 17005), (1425, 14499), (1539, 13425), (1611, 12825), (2025, 10203), (2565, 8055), (2685, 7695), (3401, 6075), (4275, 4833), (4475, 4617)]