20786840

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5839}}^1$

素因数の和:5939

約数の個数: 32

約数和(自身を含む): 47304000

約数和(自身を除く): 26517160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5839, 11678, 23356, 29195, 46712, 58390, 116780, 233560, 519671, 1039342, 2078684, 2598355, 4157368, 5196710, 10393420, 20786840]

約数ペア:

[(1, 20786840), (2, 10393420), (4, 5196710), (5, 4157368), (8, 2598355), (10, 2078684), (20, 1039342), (40, 519671), (89, 233560), (178, 116780), (356, 58390), (445, 46712), (712, 29195), (890, 23356), (1780, 11678), (3560, 5839)]