21192505

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{59}}^1\times {\mathrm{199}}^1$

素因数の和:301

約数の個数: 24

約数和(自身を含む): 27432000

約数和(自身を除く): 6239495

約数列:

[1, 5, 19, 59, 95, 199, 295, 361, 995, 1121, 1805, 3781, 5605, 11741, 18905, 21299, 58705, 71839, 106495, 223079, 359195, 1115395, 4238501, 21192505]

約数ペア:

[(1, 21192505), (5, 4238501), (19, 1115395), (59, 359195), (95, 223079), (199, 106495), (295, 71839), (361, 58705), (995, 21299), (1121, 18905), (1805, 11741), (3781, 5605)]