19778360

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10091}}^1$

素因数の和:10116

約数の個数: 48

約数和(自身を含む): 51771960

約数和(自身を除く): 31993600

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, 10091, 20182, 40364, 50455, 70637, 80728, 100910, 141274, 201820, 282548, 353185, 403640, 494459, 565096, 706370, 988918, 1412740, 1977836, 2472295, 2825480, 3955672, 4944590, 9889180, 19778360]

約数ペア:

[(1, 19778360), (2, 9889180), (4, 4944590), (5, 3955672), (7, 2825480), (8, 2472295), (10, 1977836), (14, 1412740), (20, 988918), (28, 706370), (35, 565096), (40, 494459), (49, 403640), (56, 353185), (70, 282548), (98, 201820), (140, 141274), (196, 100910), (245, 80728), (280, 70637), (392, 50455), (490, 40364), (980, 20182), (1960, 10091)]