21885040

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3853}}^1$

素因数の和:3937

約数の個数: 40

約数和(自身を含む): 51612768

約数和(自身を除く): 29727728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3853, 5680, 7706, 15412, 19265, 30824, 38530, 61648, 77060, 154120, 273563, 308240, 547126, 1094252, 1367815, 2188504, 2735630, 4377008, 5471260, 10942520, 21885040]

約数ペア:

[(1, 21885040), (2, 10942520), (4, 5471260), (5, 4377008), (8, 2735630), (10, 2188504), (16, 1367815), (20, 1094252), (40, 547126), (71, 308240), (80, 273563), (142, 154120), (284, 77060), (355, 61648), (568, 38530), (710, 30824), (1136, 19265), (1420, 15412), (2840, 7706), (3853, 5680)]