21229971

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{307}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 12477549

約数列:

[1, 3, 7, 21, 37, 89, 111, 259, 267, 307, 623, 777, 921, 1869, 2149, 3293, 6447, 9879, 11359, 23051, 27323, 34077, 69153, 79513, 81969, 191261, 238539, 573783, 1010951, 3032853, 7076657, 21229971]

約数ペア:

[(1, 21229971), (3, 7076657), (7, 3032853), (21, 1010951), (37, 573783), (89, 238539), (111, 191261), (259, 81969), (267, 79513), (307, 69153), (623, 34077), (777, 27323), (921, 23051), (1869, 11359), (2149, 9879), (3293, 6447)]