258317985

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{619}}^1\times {\mathrm{647}}^1$

素因数の和:1317

約数の個数: 32

約数和(自身を含む): 424258560

約数和(自身を除く): 165940575

約数列:

[1, 3, 5, 15, 43, 129, 215, 619, 645, 647, 1857, 1941, 3095, 3235, 9285, 9705, 26617, 27821, 79851, 83463, 133085, 139105, 399255, 400493, 417315, 1201479, 2002465, 6007395, 17221199, 51663597, 86105995, 258317985]

約数ペア:

[(1, 258317985), (3, 86105995), (5, 51663597), (15, 17221199), (43, 6007395), (129, 2002465), (215, 1201479), (619, 417315), (645, 400493), (647, 399255), (1857, 139105), (1941, 133085), (3095, 83463), (3235, 79851), (9285, 27821), (9705, 26617)]