18771335

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:140

約数の個数: 48

約数和(自身を含む): 27578880

約数和(自身を除く): 8807545

約数列:

[1, 5, 11, 19, 23, 55, 71, 95, 115, 121, 209, 253, 355, 437, 605, 781, 1045, 1265, 1349, 1633, 2185, 2299, 2783, 3905, 4807, 6745, 8165, 8591, 11495, 13915, 14839, 17963, 24035, 31027, 42955, 52877, 74195, 89815, 155135, 163229, 197593, 264385, 341297, 816145, 987965, 1706485, 3754267, 18771335]

約数ペア:

[(1, 18771335), (5, 3754267), (11, 1706485), (19, 987965), (23, 816145), (55, 341297), (71, 264385), (95, 197593), (115, 163229), (121, 155135), (209, 89815), (253, 74195), (355, 52877), (437, 42955), (605, 31027), (781, 24035), (1045, 17963), (1265, 14839), (1349, 13915), (1633, 11495), (2185, 8591), (2299, 8165), (2783, 6745), (3905, 4807)]