21036760

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9923}}^1$

素因数の和:9987

約数の個数: 32

約数和(自身を含む): 48230640

約数和(自身を除く): 27193880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9923, 19846, 39692, 49615, 79384, 99230, 198460, 396920, 525919, 1051838, 2103676, 2629595, 4207352, 5259190, 10518380, 21036760]

約数ペア:

[(1, 21036760), (2, 10518380), (4, 5259190), (5, 4207352), (8, 2629595), (10, 2103676), (20, 1051838), (40, 525919), (53, 396920), (106, 198460), (212, 99230), (265, 79384), (424, 49615), (530, 39692), (1060, 19846), (2120, 9923)]