20681745

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{3229}}^1$

素因数の和:3305

約数の個数: 32

約数和(自身を含む): 38449920

約数和(自身を除く): 17768175

約数列:

[1, 3, 5, 7, 15, 21, 35, 61, 105, 183, 305, 427, 915, 1281, 2135, 3229, 6405, 9687, 16145, 22603, 48435, 67809, 113015, 196969, 339045, 590907, 984845, 1378783, 2954535, 4136349, 6893915, 20681745]

約数ペア:

[(1, 20681745), (3, 6893915), (5, 4136349), (7, 2954535), (15, 1378783), (21, 984845), (35, 590907), (61, 339045), (105, 196969), (183, 113015), (305, 67809), (427, 48435), (915, 22603), (1281, 16145), (2135, 9687), (3229, 6405)]