21401961

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53639}}^1$

素因数の和:53668

約数の個数: 16

約数和(自身を含む): 34329600

約数和(自身を除く): 12927639

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53639, 160917, 375473, 1019141, 1126419, 3057423, 7133987, 21401961]

約数ペア:

[(1, 21401961), (3, 7133987), (7, 3057423), (19, 1126419), (21, 1019141), (57, 375473), (133, 160917), (399, 53639)]