21420795

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{659}}^1$

素因数の和:875

約数の個数: 32

約数和(自身を含む): 37635840

約数和(自身を除く): 16215045

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 197, 591, 659, 985, 1977, 2167, 2955, 3295, 6501, 7249, 9885, 10835, 21747, 32505, 36245, 108735, 129823, 389469, 649115, 1428053, 1947345, 4284159, 7140265, 21420795]

約数ペア:

[(1, 21420795), (3, 7140265), (5, 4284159), (11, 1947345), (15, 1428053), (33, 649115), (55, 389469), (165, 129823), (197, 108735), (591, 36245), (659, 32505), (985, 21747), (1977, 10835), (2167, 9885), (2955, 7249), (3295, 6501)]