257079440

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{421}}^1\times {\mathrm{449}}^1$

素因数の和:900

約数の個数: 80

約数和(自身を含む): 635785200

約数和(自身を除く): 378705760

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 421, 449, 680, 842, 898, 1360, 1684, 1796, 2105, 2245, 3368, 3592, 4210, 4490, 6736, 7157, 7184, 7633, 8420, 8980, 14314, 15266, 16840, 17960, 28628, 30532, 33680, 35785, 35920, 38165, 57256, 61064, 71570, 76330, 114512, 122128, 143140, 152660, 189029, 286280, 305320, 378058, 572560, 610640, 756116, 945145, 1512232, 1890290, 3024464, 3213493, 3780580, 6426986, 7561160, 12853972, 15122320, 16067465, 25707944, 32134930, 51415888, 64269860, 128539720, 257079440]

約数ペア:

[(1, 257079440), (2, 128539720), (4, 64269860), (5, 51415888), (8, 32134930), (10, 25707944), (16, 16067465), (17, 15122320), (20, 12853972), (34, 7561160), (40, 6426986), (68, 3780580), (80, 3213493), (85, 3024464), (136, 1890290), (170, 1512232), (272, 945145), (340, 756116), (421, 610640), (449, 572560), (680, 378058), (842, 305320), (898, 286280), (1360, 189029), (1684, 152660), (1796, 143140), (2105, 122128), (2245, 114512), (3368, 76330), (3592, 71570), (4210, 61064), (4490, 57256), (6736, 38165), (7157, 35920), (7184, 35785), (7633, 33680), (8420, 30532), (8980, 28628), (14314, 17960), (15266, 16840)]