21984921

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{11257}}^1$

素因数の和:11301

約数の個数: 24

約数和(自身を含む): 37466624

約数和(自身を除く): 15481703

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 11257, 33771, 78799, 101313, 236397, 348967, 709191, 1046901, 2442769, 3140703, 7328307, 21984921]

約数ペア:

[(1, 21984921), (3, 7328307), (7, 3140703), (9, 2442769), (21, 1046901), (31, 709191), (63, 348967), (93, 236397), (217, 101313), (279, 78799), (651, 33771), (1953, 11257)]