21545755

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{293}}^1$

素因数の和:507

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 10968293

約数列:

[1, 5, 7, 11, 35, 55, 77, 191, 293, 385, 955, 1337, 1465, 2051, 2101, 3223, 6685, 10255, 10505, 14707, 16115, 22561, 55963, 73535, 112805, 279815, 391741, 615593, 1958705, 3077965, 4309151, 21545755]

約数ペア:

[(1, 21545755), (5, 4309151), (7, 3077965), (11, 1958705), (35, 615593), (55, 391741), (77, 279815), (191, 112805), (293, 73535), (385, 55963), (955, 22561), (1337, 16115), (1465, 14707), (2051, 10505), (2101, 10255), (3223, 6685)]