21293775

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{293}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 42653520

約数和(自身を除く): 21359745

約数列:

[1, 3, 5, 9, 15, 17, 19, 25, 45, 51, 57, 75, 85, 95, 153, 171, 225, 255, 285, 293, 323, 425, 475, 765, 855, 879, 969, 1275, 1425, 1465, 1615, 2637, 2907, 3825, 4275, 4395, 4845, 4981, 5567, 7325, 8075, 13185, 14535, 14943, 16701, 21975, 24225, 24905, 27835, 44829, 50103, 65925, 72675, 74715, 83505, 94639, 124525, 139175, 224145, 250515, 283917, 373575, 417525, 473195, 851751, 1120725, 1252575, 1419585, 2365975, 4258755, 7097925, 21293775]

約数ペア:

[(1, 21293775), (3, 7097925), (5, 4258755), (9, 2365975), (15, 1419585), (17, 1252575), (19, 1120725), (25, 851751), (45, 473195), (51, 417525), (57, 373575), (75, 283917), (85, 250515), (95, 224145), (153, 139175), (171, 124525), (225, 94639), (255, 83505), (285, 74715), (293, 72675), (323, 65925), (425, 50103), (475, 44829), (765, 27835), (855, 24905), (879, 24225), (969, 21975), (1275, 16701), (1425, 14943), (1465, 14535), (1615, 13185), (2637, 8075), (2907, 7325), (3825, 5567), (4275, 4981), (4395, 4845)]