20938516

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{1289}}^1$

素因数の和:1455

約数の個数: 24

約数和(自身を含む): 38142720

約数和(自身を除く): 17204204

約数列:

[1, 2, 4, 31, 62, 124, 131, 262, 524, 1289, 2578, 4061, 5156, 8122, 16244, 39959, 79918, 159836, 168859, 337718, 675436, 5234629, 10469258, 20938516]

約数ペア:

[(1, 20938516), (2, 10469258), (4, 5234629), (31, 675436), (62, 337718), (124, 168859), (131, 159836), (262, 79918), (524, 39959), (1289, 16244), (2578, 8122), (4061, 5156)]