21402520

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1277}}^1$

素因数の和:1707

約数の個数: 32

約数和(自身を含む): 48308400

約数和(自身を除く): 26905880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1277, 1676, 2095, 2554, 3352, 4190, 5108, 6385, 8380, 10216, 12770, 16760, 25540, 51080, 535063, 1070126, 2140252, 2675315, 4280504, 5350630, 10701260, 21402520]

約数ペア:

[(1, 21402520), (2, 10701260), (4, 5350630), (5, 4280504), (8, 2675315), (10, 2140252), (20, 1070126), (40, 535063), (419, 51080), (838, 25540), (1277, 16760), (1676, 12770), (2095, 10216), (2554, 8380), (3352, 6385), (4190, 5108)]