21640366

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{223}}^1\times {\mathrm{401}}^1$

素因数の和:648

約数の個数: 24

約数和(自身を含む): 35929152

約数和(自身を除く): 14288786

約数列:

[1, 2, 11, 22, 121, 223, 242, 401, 446, 802, 2453, 4411, 4906, 8822, 26983, 48521, 53966, 89423, 97042, 178846, 983653, 1967306, 10820183, 21640366]

約数ペア:

[(1, 21640366), (2, 10820183), (11, 1967306), (22, 983653), (121, 178846), (223, 97042), (242, 89423), (401, 53966), (446, 48521), (802, 26983), (2453, 8822), (4411, 4906)]