21056581

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 27417600

約数和(自身を除く): 6361019

約数列:

[1, 7, 13, 29, 79, 91, 101, 203, 377, 553, 707, 1027, 1313, 2291, 2639, 2929, 7189, 7979, 9191, 16037, 20503, 29783, 38077, 55853, 103727, 208481, 231391, 266539, 726089, 1619737, 3008083, 21056581]

約数ペア:

[(1, 21056581), (7, 3008083), (13, 1619737), (29, 726089), (79, 266539), (91, 231391), (101, 208481), (203, 103727), (377, 55853), (553, 38077), (707, 29783), (1027, 20503), (1313, 16037), (2291, 9191), (2639, 7979), (2929, 7189)]