21000427905

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1\times {\mathrm{123601}}^1$

素因数の和:123897

約数の個数: 32

約数和(自身を含む): 34458259968

約数和(自身を除く): 13457832063

約数列:

[1, 3, 5, 15, 47, 141, 235, 241, 705, 723, 1205, 3615, 11327, 33981, 56635, 123601, 169905, 370803, 618005, 1854015, 5809247, 17427741, 29046235, 29787841, 87138705, 89363523, 148939205, 446817615, 1400028527, 4200085581, 7000142635, 21000427905]

約数ペア:

[(1, 21000427905), (3, 7000142635), (5, 4200085581), (15, 1400028527), (47, 446817615), (141, 148939205), (235, 89363523), (241, 87138705), (705, 29787841), (723, 29046235), (1205, 17427741), (3615, 5809247), (11327, 1854015), (33981, 618005), (56635, 370803), (123601, 169905)]