21161217

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{907}}^1$

素因数の和:1029

約数の個数: 32

約数和(自身を含む): 35564544

約数和(自身を除く): 14403327

約数列:

[1, 3, 7, 11, 21, 33, 77, 101, 231, 303, 707, 907, 1111, 2121, 2721, 3333, 6349, 7777, 9977, 19047, 23331, 29931, 69839, 91607, 209517, 274821, 641249, 1007677, 1923747, 3023031, 7053739, 21161217]

約数ペア:

[(1, 21161217), (3, 7053739), (7, 3023031), (11, 1923747), (21, 1007677), (33, 641249), (77, 274821), (101, 209517), (231, 91607), (303, 69839), (707, 29931), (907, 23331), (1111, 19047), (2121, 9977), (2721, 7777), (3333, 6349)]