51780280

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{139}}^2$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 119101320

約数和(自身を除く): 67321040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 139, 268, 278, 335, 536, 556, 670, 695, 1112, 1340, 1390, 2680, 2780, 5560, 9313, 18626, 19321, 37252, 38642, 46565, 74504, 77284, 93130, 96605, 154568, 186260, 193210, 372520, 386420, 772840, 1294507, 2589014, 5178028, 6472535, 10356056, 12945070, 25890140, 51780280]

約数ペア:

[(1, 51780280), (2, 25890140), (4, 12945070), (5, 10356056), (8, 6472535), (10, 5178028), (20, 2589014), (40, 1294507), (67, 772840), (134, 386420), (139, 372520), (268, 193210), (278, 186260), (335, 154568), (536, 96605), (556, 93130), (670, 77284), (695, 74504), (1112, 46565), (1340, 38642), (1390, 37252), (2680, 19321), (2780, 18626), (5560, 9313)]