640717420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{269209}}^1$

素因数の和:269242

約数の個数: 48

約数和(自身を含む): 1628182080

約数和(自身を除く): 987464660

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 476, 595, 1190, 2380, 269209, 538418, 1076836, 1346045, 1884463, 2692090, 3768926, 4576553, 5384180, 7537852, 9153106, 9422315, 18306212, 18844630, 22882765, 32035871, 37689260, 45765530, 64071742, 91531060, 128143484, 160179355, 320358710, 640717420]

約数ペア:

[(1, 640717420), (2, 320358710), (4, 160179355), (5, 128143484), (7, 91531060), (10, 64071742), (14, 45765530), (17, 37689260), (20, 32035871), (28, 22882765), (34, 18844630), (35, 18306212), (68, 9422315), (70, 9153106), (85, 7537852), (119, 5384180), (140, 4576553), (170, 3768926), (238, 2692090), (340, 1884463), (476, 1346045), (595, 1076836), (1190, 538418), (2380, 269209)]