1280739.00000000

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{89}}^2$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 53353260

約数和(自身を除く): 30223940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 89, 146, 178, 292, 356, 365, 445, 584, 712, 730, 890, 1460, 1780, 2920, 3560, 6497, 7921, 12994, 15842, 25988, 31684, 32485, 39605, 51976, 63368, 64970, 79210, 129940, 158420, 259880, 316840, 578233, 1156466, 2312932, 2891165, 4625864, 5782330, 11564660, 23129320]

約数ペア:

[(1, 23129320), (2, 11564660), (4, 5782330), (5, 4625864), (8, 2891165), (10, 2312932), (20, 1156466), (40, 578233), (73, 316840), (89, 259880), (146, 158420), (178, 129940), (292, 79210), (356, 64970), (365, 63368), (445, 51976), (584, 39605), (712, 32485), (730, 31684), (890, 25988), (1460, 15842), (1780, 12994), (2920, 7921), (3560, 6497)]