21291235

素因数分解:

$5^1\times 7^2\times {\mathrm{43}}^2\times {\mathrm{47}}^1$

素因数の和:152

約数の個数: 36

約数和(自身を含む): 31075488

約数和(自身を除く): 9784253

約数列:

[1, 5, 7, 35, 43, 47, 49, 215, 235, 245, 301, 329, 1505, 1645, 1849, 2021, 2107, 2303, 9245, 10105, 10535, 11515, 12943, 14147, 64715, 70735, 86903, 90601, 99029, 434515, 453005, 495145, 608321, 3041605, 4258247, 21291235]

約数ペア:

[(1, 21291235), (5, 4258247), (7, 3041605), (35, 608321), (43, 495145), (47, 453005), (49, 434515), (215, 99029), (235, 90601), (245, 86903), (301, 70735), (329, 64715), (1505, 14147), (1645, 12943), (1849, 11515), (2021, 10535), (2107, 10105), (2303, 9245)]