388640500

素因数分解:

$2^2\times 5^3\times {\mathrm{79}}^1\times {\mathrm{9839}}^1$

素因数の和:9937

約数の個数: 48

約数和(自身を含む): 859622400

約数和(自身を除く): 470981900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 125, 158, 250, 316, 395, 500, 790, 1580, 1975, 3950, 7900, 9839, 9875, 19678, 19750, 39356, 39500, 49195, 98390, 196780, 245975, 491950, 777281, 983900, 1229875, 1554562, 2459750, 3109124, 3886405, 4919500, 7772810, 15545620, 19432025, 38864050, 77728100, 97160125, 194320250, 388640500]

約数ペア:

[(1, 388640500), (2, 194320250), (4, 97160125), (5, 77728100), (10, 38864050), (20, 19432025), (25, 15545620), (50, 7772810), (79, 4919500), (100, 3886405), (125, 3109124), (158, 2459750), (250, 1554562), (316, 1229875), (395, 983900), (500, 777281), (790, 491950), (1580, 245975), (1975, 196780), (3950, 98390), (7900, 49195), (9839, 39500), (9875, 39356), (19678, 19750)]