21001539

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{599}}^1$

素因数の和:675

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 11254461

約数列:

[1, 3, 13, 29, 31, 39, 87, 93, 377, 403, 599, 899, 1131, 1209, 1797, 2697, 7787, 11687, 17371, 18569, 23361, 35061, 52113, 55707, 225823, 241397, 538501, 677469, 724191, 1615503, 7000513, 21001539]

約数ペア:

[(1, 21001539), (3, 7000513), (13, 1615503), (29, 724191), (31, 677469), (39, 538501), (87, 241397), (93, 225823), (377, 55707), (403, 52113), (599, 35061), (899, 23361), (1131, 18569), (1209, 17371), (1797, 11687), (2697, 7787)]