18893810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:203

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 20297230

約数列:

[1, 2, 5, 10, 13, 23, 26, 46, 65, 71, 89, 115, 130, 142, 178, 230, 299, 355, 445, 598, 710, 890, 923, 1157, 1495, 1633, 1846, 2047, 2314, 2990, 3266, 4094, 4615, 5785, 6319, 8165, 9230, 10235, 11570, 12638, 16330, 20470, 21229, 26611, 31595, 42458, 53222, 63190, 82147, 106145, 133055, 145337, 164294, 212290, 266110, 290674, 410735, 726685, 821470, 1453370, 1889381, 3778762, 9446905, 18893810]

約数ペア:

[(1, 18893810), (2, 9446905), (5, 3778762), (10, 1889381), (13, 1453370), (23, 821470), (26, 726685), (46, 410735), (65, 290674), (71, 266110), (89, 212290), (115, 164294), (130, 145337), (142, 133055), (178, 106145), (230, 82147), (299, 63190), (355, 53222), (445, 42458), (598, 31595), (710, 26611), (890, 21229), (923, 20470), (1157, 16330), (1495, 12638), (1633, 11570), (1846, 10235), (2047, 9230), (2314, 8165), (2990, 6319), (3266, 5785), (4094, 4615)]