319450720

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:420

約数の個数: 96

約数和(自身を含む): 774144000

約数和(自身を除く): 454693280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 127, 158, 160, 199, 254, 316, 395, 398, 508, 632, 635, 790, 796, 995, 1016, 1264, 1270, 1580, 1592, 1990, 2032, 2528, 2540, 3160, 3184, 3980, 4064, 5080, 6320, 6368, 7960, 10033, 10160, 12640, 15721, 15920, 20066, 20320, 25273, 31442, 31840, 40132, 50165, 50546, 62884, 78605, 80264, 100330, 101092, 125768, 126365, 157210, 160528, 200660, 202184, 251536, 252730, 314420, 321056, 401320, 404368, 503072, 505460, 628840, 802640, 808736, 1010920, 1257680, 1605280, 1996567, 2021840, 2515360, 3993134, 4043680, 7986268, 9982835, 15972536, 19965670, 31945072, 39931340, 63890144, 79862680, 159725360, 319450720]

約数ペア:

[(1, 319450720), (2, 159725360), (4, 79862680), (5, 63890144), (8, 39931340), (10, 31945072), (16, 19965670), (20, 15972536), (32, 9982835), (40, 7986268), (79, 4043680), (80, 3993134), (127, 2515360), (158, 2021840), (160, 1996567), (199, 1605280), (254, 1257680), (316, 1010920), (395, 808736), (398, 802640), (508, 628840), (632, 505460), (635, 503072), (790, 404368), (796, 401320), (995, 321056), (1016, 314420), (1264, 252730), (1270, 251536), (1580, 202184), (1592, 200660), (1990, 160528), (2032, 157210), (2528, 126365), (2540, 125768), (3160, 101092), (3184, 100330), (3980, 80264), (4064, 78605), (5080, 62884), (6320, 50546), (6368, 50165), (7960, 40132), (10033, 31840), (10160, 31442), (12640, 25273), (15721, 20320), (15920, 20066)]