19218355

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 26123328

約数和(自身を除く): 6904973

約数列:

[1, 5, 13, 37, 61, 65, 131, 185, 305, 481, 655, 793, 1703, 2257, 2405, 3965, 4847, 7991, 8515, 11285, 24235, 29341, 39955, 63011, 103883, 146705, 295667, 315055, 519415, 1478335, 3843671, 19218355]

約数ペア:

[(1, 19218355), (5, 3843671), (13, 1478335), (37, 519415), (61, 315055), (65, 295667), (131, 146705), (185, 103883), (305, 63011), (481, 39955), (655, 29341), (793, 24235), (1703, 11285), (2257, 8515), (2405, 7991), (3965, 4847)]