19639000

素因数分解:

$2^3\times 5^3\times {\mathrm{41}}^1\times {\mathrm{479}}^1$

素因数の和:541

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 27535400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 200, 205, 250, 328, 410, 479, 500, 820, 958, 1000, 1025, 1640, 1916, 2050, 2395, 3832, 4100, 4790, 5125, 8200, 9580, 10250, 11975, 19160, 19639, 20500, 23950, 39278, 41000, 47900, 59875, 78556, 95800, 98195, 119750, 157112, 196390, 239500, 392780, 479000, 490975, 785560, 981950, 1963900, 2454875, 3927800, 4909750, 9819500, 19639000]

約数ペア:

[(1, 19639000), (2, 9819500), (4, 4909750), (5, 3927800), (8, 2454875), (10, 1963900), (20, 981950), (25, 785560), (40, 490975), (41, 479000), (50, 392780), (82, 239500), (100, 196390), (125, 157112), (164, 119750), (200, 98195), (205, 95800), (250, 78556), (328, 59875), (410, 47900), (479, 41000), (500, 39278), (820, 23950), (958, 20500), (1000, 19639), (1025, 19160), (1640, 11975), (1916, 10250), (2050, 9580), (2395, 8200), (3832, 5125), (4100, 4790)]