19790180

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 43470000

約数和(自身を除く): 23679820

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 149, 229, 290, 298, 458, 580, 596, 745, 916, 1145, 1490, 2290, 2980, 4321, 4580, 6641, 8642, 13282, 17284, 21605, 26564, 33205, 34121, 43210, 66410, 68242, 86420, 132820, 136484, 170605, 341210, 682420, 989509, 1979018, 3958036, 4947545, 9895090, 19790180]

約数ペア:

[(1, 19790180), (2, 9895090), (4, 4947545), (5, 3958036), (10, 1979018), (20, 989509), (29, 682420), (58, 341210), (116, 170605), (145, 136484), (149, 132820), (229, 86420), (290, 68242), (298, 66410), (458, 43210), (580, 34121), (596, 33205), (745, 26564), (916, 21605), (1145, 17284), (1490, 13282), (2290, 8642), (2980, 6641), (4321, 4580)]