21368750

素因数分解:

$2^1\times 5^5\times {\mathrm{13}}^1\times {\mathrm{263}}^1$

素因数の和:303

約数の個数: 48

約数和(自身を含む): 43309728

約数和(自身を除く): 21940978

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 263, 325, 526, 625, 650, 1250, 1315, 1625, 2630, 3125, 3250, 3419, 6250, 6575, 6838, 8125, 13150, 16250, 17095, 32875, 34190, 40625, 65750, 81250, 85475, 164375, 170950, 328750, 427375, 821875, 854750, 1643750, 2136875, 4273750, 10684375, 21368750]

約数ペア:

[(1, 21368750), (2, 10684375), (5, 4273750), (10, 2136875), (13, 1643750), (25, 854750), (26, 821875), (50, 427375), (65, 328750), (125, 170950), (130, 164375), (250, 85475), (263, 81250), (325, 65750), (526, 40625), (625, 34190), (650, 32875), (1250, 17095), (1315, 16250), (1625, 13150), (2630, 8125), (3125, 6838), (3250, 6575), (3419, 6250)]