312531320

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{15913}}^1$

素因数の和:16415

約数の個数: 32

約数和(自身を含む): 704671920

約数和(自身を除く): 392140600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3928, 4910, 9820, 15913, 19640, 31826, 63652, 79565, 127304, 159130, 318260, 636520, 7813283, 15626566, 31253132, 39066415, 62506264, 78132830, 156265660, 312531320]

約数ペア:

[(1, 312531320), (2, 156265660), (4, 78132830), (5, 62506264), (8, 39066415), (10, 31253132), (20, 15626566), (40, 7813283), (491, 636520), (982, 318260), (1964, 159130), (2455, 127304), (3928, 79565), (4910, 63652), (9820, 31826), (15913, 19640)]