1285121435

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{19991}}^1$

素因数の和:20075

約数の個数: 32

約数和(自身を含む): 1773370368

約数和(自身を除く): 488248933

約数列:

[1, 5, 13, 23, 43, 65, 115, 215, 299, 559, 989, 1495, 2795, 4945, 12857, 19991, 64285, 99955, 259883, 459793, 859613, 1299415, 2298965, 4298065, 5977309, 11174969, 19771099, 29886545, 55874845, 98855495, 257024287, 1285121435]

約数ペア:

[(1, 1285121435), (5, 257024287), (13, 98855495), (23, 55874845), (43, 29886545), (65, 19771099), (115, 11174969), (215, 5977309), (299, 4298065), (559, 2298965), (989, 1299415), (1495, 859613), (2795, 459793), (4945, 259883), (12857, 99955), (19991, 64285)]