21387272

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{86239}}^1$

素因数の和:86276

約数の個数: 16

約数和(自身を含む): 41395200

約数和(自身を除く): 20007928

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 86239, 172478, 344956, 689912, 2673409, 5346818, 10693636, 21387272]

約数ペア:

[(1, 21387272), (2, 10693636), (4, 5346818), (8, 2673409), (31, 689912), (62, 344956), (124, 172478), (248, 86239)]