20457500

素因数分解:

$2^2\times 5^4\times 7^2\times {\mathrm{167}}^1$

素因数の和:205

約数の個数: 90

約数和(自身を含む): 52351992

約数和(自身を除く): 31894492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 125, 140, 167, 175, 196, 245, 250, 334, 350, 490, 500, 625, 668, 700, 835, 875, 980, 1169, 1225, 1250, 1670, 1750, 2338, 2450, 2500, 3340, 3500, 4175, 4375, 4676, 4900, 5845, 6125, 8183, 8350, 8750, 11690, 12250, 16366, 16700, 17500, 20875, 23380, 24500, 29225, 30625, 32732, 40915, 41750, 58450, 61250, 81830, 83500, 104375, 116900, 122500, 146125, 163660, 204575, 208750, 292250, 409150, 417500, 584500, 730625, 818300, 1022875, 1461250, 2045750, 2922500, 4091500, 5114375, 10228750, 20457500]

約数ペア:

[(1, 20457500), (2, 10228750), (4, 5114375), (5, 4091500), (7, 2922500), (10, 2045750), (14, 1461250), (20, 1022875), (25, 818300), (28, 730625), (35, 584500), (49, 417500), (50, 409150), (70, 292250), (98, 208750), (100, 204575), (125, 163660), (140, 146125), (167, 122500), (175, 116900), (196, 104375), (245, 83500), (250, 81830), (334, 61250), (350, 58450), (490, 41750), (500, 40915), (625, 32732), (668, 30625), (700, 29225), (835, 24500), (875, 23380), (980, 20875), (1169, 17500), (1225, 16700), (1250, 16366), (1670, 12250), (1750, 11690), (2338, 8750), (2450, 8350), (2500, 8183), (3340, 6125), (3500, 5845), (4175, 4900), (4375, 4676)]