21342440

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10889}}^1$

素因数の和:10914

約数の個数: 48

約数和(自身を含む): 55865700

約数和(自身を除く): 34523260

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10889, 21778, 43556, 54445, 76223, 87112, 108890, 152446, 217780, 304892, 381115, 435560, 533561, 609784, 762230, 1067122, 1524460, 2134244, 2667805, 3048920, 4268488, 5335610, 10671220, 21342440]

約数ペア:

[(1, 21342440), (2, 10671220), (4, 5335610), (5, 4268488), (7, 3048920), (8, 2667805), (10, 2134244), (14, 1524460), (20, 1067122), (28, 762230), (35, 609784), (40, 533561), (49, 435560), (56, 381115), (70, 304892), (98, 217780), (140, 152446), (196, 108890), (245, 87112), (280, 76223), (392, 54445), (490, 43556), (980, 21778), (1960, 10889)]