21090825

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{1913}}^1$

素因数の和:1943

約数の個数: 54

約数和(自身を含む): 43966494

約数和(自身を除く): 22875669

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, 1913, 2205, 3675, 5739, 9565, 11025, 13391, 17217, 28695, 40173, 47825, 66955, 86085, 93737, 120519, 143475, 200865, 281211, 334775, 430425, 468685, 602595, 843633, 1004325, 1406055, 2343425, 3012975, 4218165, 7030275, 21090825]

約数ペア:

[(1, 21090825), (3, 7030275), (5, 4218165), (7, 3012975), (9, 2343425), (15, 1406055), (21, 1004325), (25, 843633), (35, 602595), (45, 468685), (49, 430425), (63, 334775), (75, 281211), (105, 200865), (147, 143475), (175, 120519), (225, 93737), (245, 86085), (315, 66955), (441, 47825), (525, 40173), (735, 28695), (1225, 17217), (1575, 13391), (1913, 11025), (2205, 9565), (3675, 5739)]