20721514

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{557}}^1$

素因数の和:678

約数の個数: 32

約数和(自身を含む): 36158400

約数和(自身を除く): 15436886

約数列:

[1, 2, 11, 19, 22, 38, 89, 178, 209, 418, 557, 979, 1114, 1691, 1958, 3382, 6127, 10583, 12254, 18601, 21166, 37202, 49573, 99146, 116413, 232826, 545303, 941887, 1090606, 1883774, 10360757, 20721514]

約数ペア:

[(1, 20721514), (2, 10360757), (11, 1883774), (19, 1090606), (22, 941887), (38, 545303), (89, 232826), (178, 116413), (209, 99146), (418, 49573), (557, 37202), (979, 21166), (1114, 18601), (1691, 12254), (1958, 10583), (3382, 6127)]