21661978

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{49009}}^1$

素因数の和:49041

約数の個数: 16

約数和(自身を含む): 37051560

約数和(自身を除く): 15389582

約数列:

[1, 2, 13, 17, 26, 34, 221, 442, 49009, 98018, 637117, 833153, 1274234, 1666306, 10830989, 21661978]

約数ペア:

[(1, 21661978), (2, 10830989), (13, 1666306), (17, 1274234), (26, 833153), (34, 637117), (221, 98018), (442, 49009)]