21153904

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{42649}}^1$

素因数の和:42688

約数の個数: 20

約数和(自身を含む): 42308800

約数和(自身を除く): 21154896

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 42649, 85298, 170596, 341192, 682384, 1322119, 2644238, 5288476, 10576952, 21153904]

約数ペア:

[(1, 21153904), (2, 10576952), (4, 5288476), (8, 2644238), (16, 1322119), (31, 682384), (62, 341192), (124, 170596), (248, 85298), (496, 42649)]