20161031920

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1193}}^1\times {\mathrm{3463}}^1$

素因数の和:4730

約数の個数: 80

約数和(自身を含む): 47696536512

約数和(自身を除く): 27535504592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1193, 1220, 2386, 2440, 3463, 4772, 4880, 5965, 6926, 9544, 11930, 13852, 17315, 19088, 23860, 27704, 34630, 47720, 55408, 69260, 72773, 95440, 138520, 145546, 211243, 277040, 291092, 363865, 422486, 582184, 727730, 844972, 1056215, 1164368, 1455460, 1689944, 2112430, 2910920, 3379888, 4131359, 4224860, 5821840, 8262718, 8449720, 16525436, 16899440, 20656795, 33050872, 41313590, 66101744, 82627180, 165254360, 252012899, 330508720, 504025798, 1008051596, 1260064495, 2016103192, 2520128990, 4032206384, 5040257980, 10080515960, 20161031920]

約数ペア:

[(1, 20161031920), (2, 10080515960), (4, 5040257980), (5, 4032206384), (8, 2520128990), (10, 2016103192), (16, 1260064495), (20, 1008051596), (40, 504025798), (61, 330508720), (80, 252012899), (122, 165254360), (244, 82627180), (305, 66101744), (488, 41313590), (610, 33050872), (976, 20656795), (1193, 16899440), (1220, 16525436), (2386, 8449720), (2440, 8262718), (3463, 5821840), (4772, 4224860), (4880, 4131359), (5965, 3379888), (6926, 2910920), (9544, 2112430), (11930, 1689944), (13852, 1455460), (17315, 1164368), (19088, 1056215), (23860, 844972), (27704, 727730), (34630, 582184), (47720, 422486), (55408, 363865), (69260, 291092), (72773, 277040), (95440, 211243), (138520, 145546)]