19918005

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{233}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 33022080

約数和(自身を除く): 13104075

約数列:

[1, 3, 5, 15, 41, 123, 139, 205, 233, 417, 615, 695, 699, 1165, 2085, 3495, 5699, 9553, 17097, 28495, 28659, 32387, 47765, 85485, 97161, 143295, 161935, 485805, 1327867, 3983601, 6639335, 19918005]

約数ペア:

[(1, 19918005), (3, 6639335), (5, 3983601), (15, 1327867), (41, 485805), (123, 161935), (139, 143295), (205, 97161), (233, 85485), (417, 47765), (615, 32387), (695, 28659), (699, 28495), (1165, 17097), (2085, 9553), (3495, 5699)]