20664904

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{198701}}^1$

素因数の和:198720

約数の個数: 16

約数和(自身を含む): 41727420

約数和(自身を除く): 21062516

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 198701, 397402, 794804, 1589608, 2583113, 5166226, 10332452, 20664904]

約数ペア:

[(1, 20664904), (2, 10332452), (4, 5166226), (8, 2583113), (13, 1589608), (26, 794804), (52, 397402), (104, 198701)]