278984965

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1\times {\mathrm{661}}^1$

素因数の和:1093

約数の個数: 32

約数和(自身を含む): 396564480

約数和(自身を除く): 117579515

約数列:

[1, 5, 7, 31, 35, 155, 217, 389, 661, 1085, 1945, 2723, 3305, 4627, 12059, 13615, 20491, 23135, 60295, 84413, 102455, 143437, 257129, 422065, 717185, 1285645, 1799903, 7970999, 8999515, 39854995, 55796993, 278984965]

約数ペア:

[(1, 278984965), (5, 55796993), (7, 39854995), (31, 8999515), (35, 7970999), (155, 1799903), (217, 1285645), (389, 717185), (661, 422065), (1085, 257129), (1945, 143437), (2723, 102455), (3305, 84413), (4627, 60295), (12059, 23135), (13615, 20491)]