21091175

素因数分解:

$5^2\times 7^1\times {\mathrm{191}}^1\times {\mathrm{631}}^1$

素因数の和:839

約数の個数: 24

約数和(自身を含む): 30093312

約数和(自身を除く): 9002137

約数列:

[1, 5, 7, 25, 35, 175, 191, 631, 955, 1337, 3155, 4417, 4775, 6685, 15775, 22085, 33425, 110425, 120521, 602605, 843647, 3013025, 4218235, 21091175]

約数ペア:

[(1, 21091175), (5, 4218235), (7, 3013025), (25, 843647), (35, 602605), (175, 120521), (191, 110425), (631, 33425), (955, 22085), (1337, 15775), (3155, 6685), (4417, 4775)]