221078977

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{641}}^1\times {\mathrm{1699}}^1$

素因数の和:2376

約数の個数: 16

約数和(自身を含む): 261936000

約数和(自身を除く): 40857023

約数列:

[1, 7, 29, 203, 641, 1699, 4487, 11893, 18589, 49271, 130123, 344897, 1089059, 7623413, 31582711, 221078977]

約数ペア:

[(1, 221078977), (7, 31582711), (29, 7623413), (203, 1089059), (641, 344897), (1699, 130123), (4487, 49271), (11893, 18589)]