19911640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10159}}^1$

素因数の和:10184

約数の個数: 48

約数和(自身を含む): 52120800

約数和(自身を除く): 32209160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10159, 20318, 40636, 50795, 71113, 81272, 101590, 142226, 203180, 284452, 355565, 406360, 497791, 568904, 711130, 995582, 1422260, 1991164, 2488955, 2844520, 3982328, 4977910, 9955820, 19911640]

約数ペア:

[(1, 19911640), (2, 9955820), (4, 4977910), (5, 3982328), (7, 2844520), (8, 2488955), (10, 1991164), (14, 1422260), (20, 995582), (28, 711130), (35, 568904), (40, 497791), (49, 406360), (56, 355565), (70, 284452), (98, 203180), (140, 142226), (196, 101590), (245, 81272), (280, 71113), (392, 50795), (490, 40636), (980, 20318), (1960, 10159)]