20213487

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4519}}^1$

素因数の和:4603

約数の個数: 24

約数和(自身を含む): 33845760

約数和(自身を除く): 13632273

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4519, 13557, 31633, 40671, 94899, 284697, 320849, 962547, 2245943, 2887641, 6737829, 20213487]

約数ペア:

[(1, 20213487), (3, 6737829), (7, 2887641), (9, 2245943), (21, 962547), (63, 320849), (71, 284697), (213, 94899), (497, 40671), (639, 31633), (1491, 13557), (4473, 4519)]