21985131

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61583}}^1$

素因数の和:61610

約数の個数: 16

約数和(自身を含む): 35472384

約数和(自身を除く): 13487253

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 61583, 184749, 431081, 1046911, 1293243, 3140733, 7328377, 21985131]

約数ペア:

[(1, 21985131), (3, 7328377), (7, 3140733), (17, 1293243), (21, 1046911), (51, 431081), (119, 184749), (357, 61583)]