21722561

素因数分解:

$7^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1\times {\mathrm{353}}^1$

素因数の和:568

約数の個数: 16

約数和(自身を含む): 25488000

約数和(自身を除く): 3765439

約数列:

[1, 7, 59, 149, 353, 413, 1043, 2471, 8791, 20827, 52597, 61537, 145789, 368179, 3103223, 21722561]

約数ペア:

[(1, 21722561), (7, 3103223), (59, 368179), (149, 145789), (353, 61537), (413, 52597), (1043, 20827), (2471, 8791)]