21663145

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{3049}}^1$

素因数の和:3097

約数の個数: 24

約数和(自身を含む): 31293000

約数和(自身を除く): 9629855

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 3049, 7105, 15245, 21343, 88421, 106715, 149401, 442105, 618947, 747005, 3094735, 4332629, 21663145]

約数ペア:

[(1, 21663145), (5, 4332629), (7, 3094735), (29, 747005), (35, 618947), (49, 442105), (145, 149401), (203, 106715), (245, 88421), (1015, 21343), (1421, 15245), (3049, 7105)]