21507344

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{13309}}^1$

素因数の和:13418

約数の個数: 20

約数和(自身を含む): 42086220

約数和(自身を除く): 20578876

約数列:

[1, 2, 4, 8, 16, 101, 202, 404, 808, 1616, 13309, 26618, 53236, 106472, 212944, 1344209, 2688418, 5376836, 10753672, 21507344]

約数ペア:

[(1, 21507344), (2, 10753672), (4, 5376836), (8, 2688418), (16, 1344209), (101, 212944), (202, 106472), (404, 53236), (808, 26618), (1616, 13309)]