21155018

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{7841}}^1$

素因数の和:7933

約数の個数: 16

約数和(自身を含む): 33877440

約数和(自身を除く): 12722422

約数列:

[1, 2, 19, 38, 71, 142, 1349, 2698, 7841, 15682, 148979, 297958, 556711, 1113422, 10577509, 21155018]

約数ペア:

[(1, 21155018), (2, 10577509), (19, 1113422), (38, 556711), (71, 297958), (142, 148979), (1349, 15682), (2698, 7841)]