21118136

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{809}}^1$

素因数の和:1079

約数の個数: 32

約数和(自身を含む): 42865200

約数和(自身を除く): 21747064

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 251, 502, 809, 1004, 1618, 2008, 3236, 3263, 6472, 6526, 10517, 13052, 21034, 26104, 42068, 84136, 203059, 406118, 812236, 1624472, 2639767, 5279534, 10559068, 21118136]

約数ペア:

[(1, 21118136), (2, 10559068), (4, 5279534), (8, 2639767), (13, 1624472), (26, 812236), (52, 406118), (104, 203059), (251, 84136), (502, 42068), (809, 26104), (1004, 21034), (1618, 13052), (2008, 10517), (3236, 6526), (3263, 6472)]