19729255

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{331}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 29449728

約数和(自身を除く): 9720473

約数列:

[1, 5, 7, 13, 35, 65, 91, 131, 331, 455, 655, 917, 1655, 1703, 2317, 4303, 4585, 8515, 11585, 11921, 21515, 30121, 43361, 59605, 150605, 216805, 303527, 563693, 1517635, 2818465, 3945851, 19729255]

約数ペア:

[(1, 19729255), (5, 3945851), (7, 2818465), (13, 1517635), (35, 563693), (65, 303527), (91, 216805), (131, 150605), (331, 59605), (455, 43361), (655, 30121), (917, 21515), (1655, 11921), (1703, 11585), (2317, 8515), (4303, 4585)]