21290416

素因数分解:

$2^4\times 7^1\times {\mathrm{190093}}^1$

素因数の和:190108

約数の個数: 20

約数和(自身を含む): 47143312

約数和(自身を除く): 25852896

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 190093, 380186, 760372, 1330651, 1520744, 2661302, 3041488, 5322604, 10645208, 21290416]

約数ペア:

[(1, 21290416), (2, 10645208), (4, 5322604), (7, 3041488), (8, 2661302), (14, 1520744), (16, 1330651), (28, 760372), (56, 380186), (112, 190093)]