21709780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{57131}}^1$

素因数の和:57159

約数の個数: 24

約数和(自身を含む): 47990880

約数和(自身を除く): 26281100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 57131, 114262, 228524, 285655, 571310, 1085489, 1142620, 2170978, 4341956, 5427445, 10854890, 21709780]

約数ペア:

[(1, 21709780), (2, 10854890), (4, 5427445), (5, 4341956), (10, 2170978), (19, 1142620), (20, 1085489), (38, 571310), (76, 285655), (95, 228524), (190, 114262), (380, 57131)]