21310780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{56081}}^1$

素因数の和:56109

約数の個数: 24

約数和(自身を含む): 47108880

約数和(自身を除く): 25798100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 56081, 112162, 224324, 280405, 560810, 1065539, 1121620, 2131078, 4262156, 5327695, 10655390, 21310780]

約数ペア:

[(1, 21310780), (2, 10655390), (4, 5327695), (5, 4262156), (10, 2131078), (19, 1121620), (20, 1065539), (38, 560810), (76, 280405), (95, 224324), (190, 112162), (380, 56081)]