21517595

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{349}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 30240000

約数和(自身を除く): 8722405

約数列:

[1, 5, 11, 19, 55, 59, 95, 209, 295, 349, 649, 1045, 1121, 1745, 3245, 3839, 5605, 6631, 12331, 19195, 20591, 33155, 61655, 72941, 102955, 226501, 364705, 391229, 1132505, 1956145, 4303519, 21517595]

約数ペア:

[(1, 21517595), (5, 4303519), (11, 1956145), (19, 1132505), (55, 391229), (59, 364705), (95, 226501), (209, 102955), (295, 72941), (349, 61655), (649, 33155), (1045, 20591), (1121, 19195), (1745, 12331), (3245, 6631), (3839, 5605)]