81225520

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{223}}^1$

素因数の和:422

約数の個数: 80

約数和(自身を含む): 197487360

約数和(自身を除く): 116261840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 157, 223, 232, 290, 314, 446, 464, 580, 628, 785, 892, 1115, 1160, 1256, 1570, 1784, 2230, 2320, 2512, 3140, 3568, 4460, 4553, 6280, 6467, 8920, 9106, 12560, 12934, 17840, 18212, 22765, 25868, 32335, 35011, 36424, 45530, 51736, 64670, 70022, 72848, 91060, 103472, 129340, 140044, 175055, 182120, 258680, 280088, 350110, 364240, 517360, 560176, 700220, 1015319, 1400440, 2030638, 2800880, 4061276, 5076595, 8122552, 10153190, 16245104, 20306380, 40612760, 81225520]

約数ペア:

[(1, 81225520), (2, 40612760), (4, 20306380), (5, 16245104), (8, 10153190), (10, 8122552), (16, 5076595), (20, 4061276), (29, 2800880), (40, 2030638), (58, 1400440), (80, 1015319), (116, 700220), (145, 560176), (157, 517360), (223, 364240), (232, 350110), (290, 280088), (314, 258680), (446, 182120), (464, 175055), (580, 140044), (628, 129340), (785, 103472), (892, 91060), (1115, 72848), (1160, 70022), (1256, 64670), (1570, 51736), (1784, 45530), (2230, 36424), (2320, 35011), (2512, 32335), (3140, 25868), (3568, 22765), (4460, 18212), (4553, 17840), (6280, 12934), (6467, 12560), (8920, 9106)]