21168240

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{193}}^1\times {\mathrm{457}}^1$

素因数の和:666

約数の個数: 80

約数和(自身を含む): 66105888

約数和(自身を除く): 44937648

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 193, 240, 386, 457, 579, 772, 914, 965, 1158, 1371, 1544, 1828, 1930, 2285, 2316, 2742, 2895, 3088, 3656, 3860, 4570, 4632, 5484, 5790, 6855, 7312, 7720, 9140, 9264, 10968, 11580, 13710, 15440, 18280, 21936, 23160, 27420, 36560, 46320, 54840, 88201, 109680, 176402, 264603, 352804, 441005, 529206, 705608, 882010, 1058412, 1323015, 1411216, 1764020, 2116824, 2646030, 3528040, 4233648, 5292060, 7056080, 10584120, 21168240]

約数ペア:

[(1, 21168240), (2, 10584120), (3, 7056080), (4, 5292060), (5, 4233648), (6, 3528040), (8, 2646030), (10, 2116824), (12, 1764020), (15, 1411216), (16, 1323015), (20, 1058412), (24, 882010), (30, 705608), (40, 529206), (48, 441005), (60, 352804), (80, 264603), (120, 176402), (193, 109680), (240, 88201), (386, 54840), (457, 46320), (579, 36560), (772, 27420), (914, 23160), (965, 21936), (1158, 18280), (1371, 15440), (1544, 13710), (1828, 11580), (1930, 10968), (2285, 9264), (2316, 9140), (2742, 7720), (2895, 7312), (3088, 6855), (3656, 5790), (3860, 5484), (4570, 4632)]