865280

素因数分解:

$2^{10}\times 5^1\times {\mathrm{13}}^2$

素因数の和:51

約数の個数: 66

約数和(自身を含む): 2247606

約数和(自身を除く): 1382326

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 169, 208, 256, 260, 320, 338, 416, 512, 520, 640, 676, 832, 845, 1024, 1040, 1280, 1352, 1664, 1690, 2080, 2560, 2704, 3328, 3380, 4160, 5120, 5408, 6656, 6760, 8320, 10816, 13312, 13520, 16640, 21632, 27040, 33280, 43264, 54080, 66560, 86528, 108160, 173056, 216320, 432640, 865280]

約数ペア:

[(1, 865280), (2, 432640), (4, 216320), (5, 173056), (8, 108160), (10, 86528), (13, 66560), (16, 54080), (20, 43264), (26, 33280), (32, 27040), (40, 21632), (52, 16640), (64, 13520), (65, 13312), (80, 10816), (104, 8320), (128, 6760), (130, 6656), (160, 5408), (169, 5120), (208, 4160), (256, 3380), (260, 3328), (320, 2704), (338, 2560), (416, 2080), (512, 1690), (520, 1664), (640, 1352), (676, 1280), (832, 1040), (845, 1024)]