21487851

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{307}}^1$

素因数の和:432

約数の個数: 48

約数和(自身を含む): 39207168

約数和(自身を除く): 17719317

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 101, 231, 303, 307, 693, 707, 909, 921, 1111, 2121, 2149, 2763, 3333, 3377, 6363, 6447, 7777, 9999, 10131, 19341, 23331, 23639, 30393, 31007, 69993, 70917, 93021, 212751, 217049, 279063, 341077, 651147, 1023231, 1953441, 2387539, 3069693, 7162617, 21487851]

約数ペア:

[(1, 21487851), (3, 7162617), (7, 3069693), (9, 2387539), (11, 1953441), (21, 1023231), (33, 651147), (63, 341077), (77, 279063), (99, 217049), (101, 212751), (231, 93021), (303, 70917), (307, 69993), (693, 31007), (707, 30393), (909, 23639), (921, 23331), (1111, 19341), (2121, 10131), (2149, 9999), (2763, 7777), (3333, 6447), (3377, 6363)]