19902961

素因数分解:

${\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:217

約数の個数: 24

約数和(自身を含む): 23189760

約数和(自身を除く): 3286799

約数列:

[1, 13, 29, 31, 131, 169, 377, 403, 899, 1703, 3799, 4061, 4901, 5239, 11687, 22139, 49387, 52793, 117769, 151931, 642031, 686309, 1530997, 19902961]

約数ペア:

[(1, 19902961), (13, 1530997), (29, 686309), (31, 642031), (131, 151931), (169, 117769), (377, 52793), (403, 49387), (899, 22139), (1703, 11687), (3799, 5239), (4061, 4901)]