21255105

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61609}}^1$

素因数の和:61640

約数の個数: 16

約数和(自身を含む): 35487360

約数和(自身を除く): 14232255

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61609, 184827, 308045, 924135, 1417007, 4251021, 7085035, 21255105]

約数ペア:

[(1, 21255105), (3, 7085035), (5, 4251021), (15, 1417007), (23, 924135), (69, 308045), (115, 184827), (345, 61609)]