21291856

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70039}}^1$

素因数の和:70066

約数の個数: 20

約数和(自身を含む): 43424800

約数和(自身を除く): 22132944

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70039, 140078, 280156, 560312, 1120624, 1330741, 2661482, 5322964, 10645928, 21291856]

約数ペア:

[(1, 21291856), (2, 10645928), (4, 5322964), (8, 2661482), (16, 1330741), (19, 1120624), (38, 560312), (76, 280156), (152, 140078), (304, 70039)]