20657955

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 34069248

約数和(自身を除く): 13411293

約数列:

[1, 3, 5, 15, 61, 107, 183, 211, 305, 321, 535, 633, 915, 1055, 1605, 3165, 6527, 12871, 19581, 22577, 32635, 38613, 64355, 67731, 97905, 112885, 193065, 338655, 1377197, 4131591, 6885985, 20657955]

約数ペア:

[(1, 20657955), (3, 6885985), (5, 4131591), (15, 1377197), (61, 338655), (107, 193065), (183, 112885), (211, 97905), (305, 67731), (321, 64355), (535, 38613), (633, 32635), (915, 22577), (1055, 19581), (1605, 12871), (3165, 6527)]