81526620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{499}}^1$

素因数の和:907

約数の個数: 96

約数和(自身を含む): 262080000

約数和(自身を除く): 180553380

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 389, 420, 499, 778, 998, 1167, 1497, 1556, 1945, 1996, 2334, 2495, 2723, 2994, 3493, 3890, 4668, 4990, 5446, 5835, 5988, 6986, 7485, 7780, 8169, 9980, 10479, 10892, 11670, 13615, 13972, 14970, 16338, 17465, 20958, 23340, 27230, 29940, 32676, 34930, 40845, 41916, 52395, 54460, 69860, 81690, 104790, 163380, 194111, 209580, 388222, 582333, 776444, 970555, 1164666, 1358777, 1941110, 2329332, 2717554, 2911665, 3882220, 4076331, 5435108, 5823330, 6793885, 8152662, 11646660, 13587770, 16305324, 20381655, 27175540, 40763310, 81526620]

約数ペア:

[(1, 81526620), (2, 40763310), (3, 27175540), (4, 20381655), (5, 16305324), (6, 13587770), (7, 11646660), (10, 8152662), (12, 6793885), (14, 5823330), (15, 5435108), (20, 4076331), (21, 3882220), (28, 2911665), (30, 2717554), (35, 2329332), (42, 1941110), (60, 1358777), (70, 1164666), (84, 970555), (105, 776444), (140, 582333), (210, 388222), (389, 209580), (420, 194111), (499, 163380), (778, 104790), (998, 81690), (1167, 69860), (1497, 54460), (1556, 52395), (1945, 41916), (1996, 40845), (2334, 34930), (2495, 32676), (2723, 29940), (2994, 27230), (3493, 23340), (3890, 20958), (4668, 17465), (4990, 16338), (5446, 14970), (5835, 13972), (5988, 13615), (6986, 11670), (7485, 10892), (7780, 10479), (8169, 9980)]