21648921

素因数分解:

$3^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{5233}}^1$

素因数の和:5440

約数の個数: 16

約数和(自身を含む): 33162624

約数和(自身を除く): 11513703

約数列:

[1, 3, 7, 21, 197, 591, 1379, 4137, 5233, 15699, 36631, 109893, 1030901, 3092703, 7216307, 21648921]

約数ペア:

[(1, 21648921), (3, 7216307), (7, 3092703), (21, 1030901), (197, 109893), (591, 36631), (1379, 15699), (4137, 5233)]