20994320

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{359}}^1$

素因数の和:432

約数の個数: 80

約数和(自身を含む): 53032320

約数和(自身を除く): 32038000

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 80, 85, 86, 136, 170, 172, 215, 272, 340, 344, 359, 430, 680, 688, 718, 731, 860, 1360, 1436, 1462, 1720, 1795, 2872, 2924, 3440, 3590, 3655, 5744, 5848, 6103, 7180, 7310, 11696, 12206, 14360, 14620, 15437, 24412, 28720, 29240, 30515, 30874, 48824, 58480, 61030, 61748, 77185, 97648, 122060, 123496, 154370, 244120, 246992, 262429, 308740, 488240, 524858, 617480, 1049716, 1234960, 1312145, 2099432, 2624290, 4198864, 5248580, 10497160, 20994320]

約数ペア:

[(1, 20994320), (2, 10497160), (4, 5248580), (5, 4198864), (8, 2624290), (10, 2099432), (16, 1312145), (17, 1234960), (20, 1049716), (34, 617480), (40, 524858), (43, 488240), (68, 308740), (80, 262429), (85, 246992), (86, 244120), (136, 154370), (170, 123496), (172, 122060), (215, 97648), (272, 77185), (340, 61748), (344, 61030), (359, 58480), (430, 48824), (680, 30874), (688, 30515), (718, 29240), (731, 28720), (860, 24412), (1360, 15437), (1436, 14620), (1462, 14360), (1720, 12206), (1795, 11696), (2872, 7310), (2924, 7180), (3440, 6103), (3590, 5848), (3655, 5744)]