257231728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{65089}}^1$

素因数の和:65129

約数の個数: 40

約数和(自身を含む): 564981200

約数和(自身を除く): 307749472

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 65089, 130178, 260356, 520712, 846157, 1041424, 1236691, 1692314, 2473382, 3384628, 4946764, 6769256, 9893528, 13538512, 16076983, 19787056, 32153966, 64307932, 128615864, 257231728]

約数ペア:

[(1, 257231728), (2, 128615864), (4, 64307932), (8, 32153966), (13, 19787056), (16, 16076983), (19, 13538512), (26, 9893528), (38, 6769256), (52, 4946764), (76, 3384628), (104, 2473382), (152, 1692314), (208, 1236691), (247, 1041424), (304, 846157), (494, 520712), (988, 260356), (1976, 130178), (3952, 65089)]