15988120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:332

約数の個数: 64

約数和(自身を含む): 38412000

約数和(自身を除く): 22423880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 109, 152, 190, 193, 218, 380, 386, 436, 545, 760, 772, 872, 965, 1090, 1544, 1930, 2071, 2180, 3667, 3860, 4142, 4360, 7334, 7720, 8284, 10355, 14668, 16568, 18335, 20710, 21037, 29336, 36670, 41420, 42074, 73340, 82840, 84148, 105185, 146680, 168296, 210370, 399703, 420740, 799406, 841480, 1598812, 1998515, 3197624, 3997030, 7994060, 15988120]

約数ペア:

[(1, 15988120), (2, 7994060), (4, 3997030), (5, 3197624), (8, 1998515), (10, 1598812), (19, 841480), (20, 799406), (38, 420740), (40, 399703), (76, 210370), (95, 168296), (109, 146680), (152, 105185), (190, 84148), (193, 82840), (218, 73340), (380, 42074), (386, 41420), (436, 36670), (545, 29336), (760, 21037), (772, 20710), (872, 18335), (965, 16568), (1090, 14668), (1544, 10355), (1930, 8284), (2071, 7720), (2180, 7334), (3667, 4360), (3860, 4142)]