19690720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{17581}}^1$

素因数の和:17603

約数の個数: 48

約数和(自身を含む): 53167968

約数和(自身を除く): 33477248

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 17581, 35162, 70324, 87905, 123067, 140648, 175810, 246134, 281296, 351620, 492268, 562592, 615335, 703240, 984536, 1230670, 1406480, 1969072, 2461340, 2812960, 3938144, 4922680, 9845360, 19690720]

約数ペア:

[(1, 19690720), (2, 9845360), (4, 4922680), (5, 3938144), (7, 2812960), (8, 2461340), (10, 1969072), (14, 1406480), (16, 1230670), (20, 984536), (28, 703240), (32, 615335), (35, 562592), (40, 492268), (56, 351620), (70, 281296), (80, 246134), (112, 175810), (140, 140648), (160, 123067), (224, 87905), (280, 70324), (560, 35162), (1120, 17581)]