21013520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23879}}^1$

素因数の和:23903

約数の個数: 40

約数和(自身を含む): 53300160

約数和(自身を除く): 32286640

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23879, 47758, 95516, 119395, 191032, 238790, 262669, 382064, 477580, 525338, 955160, 1050676, 1313345, 1910320, 2101352, 2626690, 4202704, 5253380, 10506760, 21013520]

約数ペア:

[(1, 21013520), (2, 10506760), (4, 5253380), (5, 4202704), (8, 2626690), (10, 2101352), (11, 1910320), (16, 1313345), (20, 1050676), (22, 955160), (40, 525338), (44, 477580), (55, 382064), (80, 262669), (88, 238790), (110, 191032), (176, 119395), (220, 95516), (440, 47758), (880, 23879)]