19804144

素因数分解:

$2^4\times {\mathrm{991}}^1\times {\mathrm{1249}}^1$

素因数の和:2248

約数の個数: 20

約数和(自身を含む): 38440000

約数和(自身を除く): 18635856

約数列:

[1, 2, 4, 8, 16, 991, 1249, 1982, 2498, 3964, 4996, 7928, 9992, 15856, 19984, 1237759, 2475518, 4951036, 9902072, 19804144]

約数ペア:

[(1, 19804144), (2, 9902072), (4, 4951036), (8, 2475518), (16, 1237759), (991, 19984), (1249, 15856), (1982, 9992), (2498, 7928), (3964, 4996)]