21580016

素因数分解:

$2^4\times {\mathrm{991}}^1\times {\mathrm{1361}}^1$

素因数の和:2360

約数の個数: 20

約数和(自身を含む): 41884224

約数和(自身を除く): 20304208

約数列:

[1, 2, 4, 8, 16, 991, 1361, 1982, 2722, 3964, 5444, 7928, 10888, 15856, 21776, 1348751, 2697502, 5395004, 10790008, 21580016]

約数ペア:

[(1, 21580016), (2, 10790008), (4, 5395004), (8, 2697502), (16, 1348751), (991, 21776), (1361, 15856), (1982, 10888), (2722, 7928), (3964, 5444)]