21909945

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{1303}}^1$

素因数の和:1389

約数の個数: 32

約数和(自身を含む): 37555200

約数和(自身を除く): 15645255

約数列:

[1, 3, 5, 15, 19, 57, 59, 95, 177, 285, 295, 885, 1121, 1303, 3363, 3909, 5605, 6515, 16815, 19545, 24757, 74271, 76877, 123785, 230631, 371355, 384385, 1153155, 1460663, 4381989, 7303315, 21909945]

約数ペア:

[(1, 21909945), (3, 7303315), (5, 4381989), (15, 1460663), (19, 1153155), (57, 384385), (59, 371355), (95, 230631), (177, 123785), (285, 76877), (295, 74271), (885, 24757), (1121, 19545), (1303, 16815), (3363, 6515), (3909, 5605)]