257790

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:684

約数の個数: 32

約数和(自身を含む): 667296

約数和(自身を除く): 409506

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 661, 1322, 1983, 3305, 3966, 6610, 8593, 9915, 17186, 19830, 25779, 42965, 51558, 85930, 128895, 257790]

約数ペア:

[(1, 257790), (2, 128895), (3, 85930), (5, 51558), (6, 42965), (10, 25779), (13, 19830), (15, 17186), (26, 9915), (30, 8593), (39, 6610), (65, 3966), (78, 3305), (130, 1983), (195, 1322), (390, 661)]