21177065

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 32654160

約数和(自身を除く): 11477095

約数列:

[1, 5, 7, 13, 35, 49, 61, 65, 91, 109, 245, 305, 427, 455, 545, 637, 763, 793, 1417, 2135, 2989, 3185, 3815, 3965, 5341, 5551, 6649, 7085, 9919, 14945, 26705, 27755, 33245, 38857, 46543, 49595, 69433, 86437, 194285, 232715, 325801, 347165, 432185, 605059, 1629005, 3025295, 4235413, 21177065]

約数ペア:

[(1, 21177065), (5, 4235413), (7, 3025295), (13, 1629005), (35, 605059), (49, 432185), (61, 347165), (65, 325801), (91, 232715), (109, 194285), (245, 86437), (305, 69433), (427, 49595), (455, 46543), (545, 38857), (637, 33245), (763, 27755), (793, 26705), (1417, 14945), (2135, 9919), (2989, 7085), (3185, 6649), (3815, 5551), (3965, 5341)]