1261995890

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1777459}}^1$

素因数の和:1777537

約数の個数: 16

約数和(自身を含む): 2303588160

約数和(自身を除く): 1041592270

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 1777459, 3554918, 8887295, 17774590, 126199589, 252399178, 630997945, 1261995890]

約数ペア:

[(1, 1261995890), (2, 630997945), (5, 252399178), (10, 126199589), (71, 17774590), (142, 8887295), (355, 3554918), (710, 1777459)]