21102921

素因数分解:

$3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{2557}}^1$

素因数の和:2701

約数の個数: 24

約数和(自身を含む): 35116224

約数和(自身を除く): 14013303

約数列:

[1, 3, 7, 9, 21, 63, 131, 393, 917, 1179, 2557, 2751, 7671, 8253, 17899, 23013, 53697, 161091, 334967, 1004901, 2344769, 3014703, 7034307, 21102921]

約数ペア:

[(1, 21102921), (3, 7034307), (7, 3014703), (9, 2344769), (21, 1004901), (63, 334967), (131, 161091), (393, 53697), (917, 23013), (1179, 17899), (2557, 8253), (2751, 7671)]