21057968

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77419}}^1$

素因数の和:77444

約数の個数: 20

約数和(自身を含む): 43200360

約数和(自身を除く): 22142392

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77419, 154838, 309676, 619352, 1238704, 1316123, 2632246, 5264492, 10528984, 21057968]

約数ペア:

[(1, 21057968), (2, 10528984), (4, 5264492), (8, 2632246), (16, 1316123), (17, 1238704), (34, 619352), (68, 309676), (136, 154838), (272, 77419)]