21152369

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{379}}^1$

素因数の和:477

約数の個数: 24

約数和(自身を含む): 26511840

約数和(自身を除く): 5359471

約数列:

[1, 7, 17, 49, 67, 119, 379, 469, 833, 1139, 2653, 3283, 6443, 7973, 18571, 25393, 45101, 55811, 177751, 315707, 431681, 1244257, 3021767, 21152369]

約数ペア:

[(1, 21152369), (7, 3021767), (17, 1244257), (49, 431681), (67, 315707), (119, 177751), (379, 55811), (469, 45101), (833, 25393), (1139, 18571), (2653, 7973), (3283, 6443)]