21392920

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{10091}}^1$

素因数の和:10155

約数の個数: 32

約数和(自身を含む): 49047120

約数和(自身を除く): 27654200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 10091, 20182, 40364, 50455, 80728, 100910, 201820, 403640, 534823, 1069646, 2139292, 2674115, 4278584, 5348230, 10696460, 21392920]

約数ペア:

[(1, 21392920), (2, 10696460), (4, 5348230), (5, 4278584), (8, 2674115), (10, 2139292), (20, 1069646), (40, 534823), (53, 403640), (106, 201820), (212, 100910), (265, 80728), (424, 50455), (530, 40364), (1060, 20182), (2120, 10091)]