21387816

素因数分解:

$2^3\times 3^2\times {\mathrm{127}}^1\times {\mathrm{2339}}^1$

素因数の和:2478

約数の個数: 48

約数和(自身を含む): 58406400

約数和(自身を除く): 37018584

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 127, 254, 381, 508, 762, 1016, 1143, 1524, 2286, 2339, 3048, 4572, 4678, 7017, 9144, 9356, 14034, 18712, 21051, 28068, 42102, 56136, 84204, 168408, 297053, 594106, 891159, 1188212, 1782318, 2376424, 2673477, 3564636, 5346954, 7129272, 10693908, 21387816]

約数ペア:

[(1, 21387816), (2, 10693908), (3, 7129272), (4, 5346954), (6, 3564636), (8, 2673477), (9, 2376424), (12, 1782318), (18, 1188212), (24, 891159), (36, 594106), (72, 297053), (127, 168408), (254, 84204), (381, 56136), (508, 42102), (762, 28068), (1016, 21051), (1143, 18712), (1524, 14034), (2286, 9356), (2339, 9144), (3048, 7017), (4572, 4678)]