20160920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{283}}^1$

素因数の和:444

約数の個数: 64

約数和(自身を含む): 49381920

約数和(自身を除く): 29221000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 137, 260, 274, 283, 520, 548, 566, 685, 1096, 1132, 1370, 1415, 1781, 2264, 2740, 2830, 3562, 3679, 5480, 5660, 7124, 7358, 8905, 11320, 14248, 14716, 17810, 18395, 29432, 35620, 36790, 38771, 71240, 73580, 77542, 147160, 155084, 193855, 310168, 387710, 504023, 775420, 1008046, 1550840, 2016092, 2520115, 4032184, 5040230, 10080460, 20160920]

約数ペア:

[(1, 20160920), (2, 10080460), (4, 5040230), (5, 4032184), (8, 2520115), (10, 2016092), (13, 1550840), (20, 1008046), (26, 775420), (40, 504023), (52, 387710), (65, 310168), (104, 193855), (130, 155084), (137, 147160), (260, 77542), (274, 73580), (283, 71240), (520, 38771), (548, 36790), (566, 35620), (685, 29432), (1096, 18395), (1132, 17810), (1370, 14716), (1415, 14248), (1781, 11320), (2264, 8905), (2740, 7358), (2830, 7124), (3562, 5660), (3679, 5480)]