20828560

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1$

素因数の和:296

約数の個数: 80

約数和(自身を含む): 51960960

約数和(自身を除く): 31132400

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 71, 76, 80, 95, 142, 152, 190, 193, 284, 304, 355, 380, 386, 568, 710, 760, 772, 965, 1136, 1349, 1420, 1520, 1544, 1930, 2698, 2840, 3088, 3667, 3860, 5396, 5680, 6745, 7334, 7720, 10792, 13490, 13703, 14668, 15440, 18335, 21584, 26980, 27406, 29336, 36670, 53960, 54812, 58672, 68515, 73340, 107920, 109624, 137030, 146680, 219248, 260357, 274060, 293360, 520714, 548120, 1041428, 1096240, 1301785, 2082856, 2603570, 4165712, 5207140, 10414280, 20828560]

約数ペア:

[(1, 20828560), (2, 10414280), (4, 5207140), (5, 4165712), (8, 2603570), (10, 2082856), (16, 1301785), (19, 1096240), (20, 1041428), (38, 548120), (40, 520714), (71, 293360), (76, 274060), (80, 260357), (95, 219248), (142, 146680), (152, 137030), (190, 109624), (193, 107920), (284, 73340), (304, 68515), (355, 58672), (380, 54812), (386, 53960), (568, 36670), (710, 29336), (760, 27406), (772, 26980), (965, 21584), (1136, 18335), (1349, 15440), (1420, 14668), (1520, 13703), (1544, 13490), (1930, 10792), (2698, 7720), (2840, 7334), (3088, 6745), (3667, 5680), (3860, 5396)]