21365750

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{421}}^1$

素因数の和:474

約数の個数: 64

約数和(自身を含む): 47399040

約数和(自身を除く): 26033290

約数列:

[1, 2, 5, 7, 10, 14, 25, 29, 35, 50, 58, 70, 125, 145, 175, 203, 250, 290, 350, 406, 421, 725, 842, 875, 1015, 1450, 1750, 2030, 2105, 2947, 3625, 4210, 5075, 5894, 7250, 10150, 10525, 12209, 14735, 21050, 24418, 25375, 29470, 50750, 52625, 61045, 73675, 85463, 105250, 122090, 147350, 170926, 305225, 368375, 427315, 610450, 736750, 854630, 1526125, 2136575, 3052250, 4273150, 10682875, 21365750]

約数ペア:

[(1, 21365750), (2, 10682875), (5, 4273150), (7, 3052250), (10, 2136575), (14, 1526125), (25, 854630), (29, 736750), (35, 610450), (50, 427315), (58, 368375), (70, 305225), (125, 170926), (145, 147350), (175, 122090), (203, 105250), (250, 85463), (290, 73675), (350, 61045), (406, 52625), (421, 50750), (725, 29470), (842, 25375), (875, 24418), (1015, 21050), (1450, 14735), (1750, 12209), (2030, 10525), (2105, 10150), (2947, 7250), (3625, 5894), (4210, 5075)]