1277654320

素因数分解:

$2^4\times 5^1\times {\mathrm{15970679}}^1$

素因数の和:15970692

約数の個数: 20

約数和(自身を含む): 2970546480

約数和(自身を除く): 1692892160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 15970679, 31941358, 63882716, 79853395, 127765432, 159706790, 255530864, 319413580, 638827160, 1277654320]

約数ペア:

[(1, 1277654320), (2, 638827160), (4, 319413580), (5, 255530864), (8, 159706790), (10, 127765432), (16, 79853395), (20, 63882716), (40, 31941358), (80, 15970679)]