21535778

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{51521}}^1$

素因数の和:51553

約数の個数: 16

約数和(自身を含む): 37095840

約数和(自身を除く): 15560062

約数列:

[1, 2, 11, 19, 22, 38, 209, 418, 51521, 103042, 566731, 978899, 1133462, 1957798, 10767889, 21535778]

約数ペア:

[(1, 21535778), (2, 10767889), (11, 1957798), (19, 1133462), (22, 978899), (38, 566731), (209, 103042), (418, 51521)]