21459376

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9649}}^1$

素因数の和:9796

約数の個数: 20

約数和(自身を含む): 41881000

約数和(自身を除く): 20421624

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9649, 19298, 38596, 77192, 154384, 1341211, 2682422, 5364844, 10729688, 21459376]

約数ペア:

[(1, 21459376), (2, 10729688), (4, 5364844), (8, 2682422), (16, 1341211), (139, 154384), (278, 77192), (556, 38596), (1112, 19298), (2224, 9649)]