20193920

素因数分解:

$2^7\times 5^1\times {\mathrm{139}}^1\times {\mathrm{227}}^1$

素因数の和:385

約数の個数: 64

約数和(自身を含む): 48837600

約数和(自身を除く): 28643680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 139, 160, 227, 278, 320, 454, 556, 640, 695, 908, 1112, 1135, 1390, 1816, 2224, 2270, 2780, 3632, 4448, 4540, 5560, 7264, 8896, 9080, 11120, 14528, 17792, 18160, 22240, 29056, 31553, 36320, 44480, 63106, 72640, 88960, 126212, 145280, 157765, 252424, 315530, 504848, 631060, 1009696, 1262120, 2019392, 2524240, 4038784, 5048480, 10096960, 20193920]

約数ペア:

[(1, 20193920), (2, 10096960), (4, 5048480), (5, 4038784), (8, 2524240), (10, 2019392), (16, 1262120), (20, 1009696), (32, 631060), (40, 504848), (64, 315530), (80, 252424), (128, 157765), (139, 145280), (160, 126212), (227, 88960), (278, 72640), (320, 63106), (454, 44480), (556, 36320), (640, 31553), (695, 29056), (908, 22240), (1112, 18160), (1135, 17792), (1390, 14528), (1816, 11120), (2224, 9080), (2270, 8896), (2780, 7264), (3632, 5560), (4448, 4540)]