4000280

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1031}}^1$

素因数の和:1139

約数の個数: 32

約数和(自身を含む): 9102240

約数和(自身を除く): 5101960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1031, 1940, 2062, 3880, 4124, 5155, 8248, 10310, 20620, 41240, 100007, 200014, 400028, 500035, 800056, 1000070, 2000140, 4000280]

約数ペア:

[(1, 4000280), (2, 2000140), (4, 1000070), (5, 800056), (8, 500035), (10, 400028), (20, 200014), (40, 100007), (97, 41240), (194, 20620), (388, 10310), (485, 8248), (776, 5155), (970, 4124), (1031, 3880), (1940, 2062)]