21501285

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1553}}^1$

素因数の和:1645

約数の個数: 32

約数和(自身を含む): 37594368

約数和(自身を除く): 16093083

約数列:

[1, 3, 5, 13, 15, 39, 65, 71, 195, 213, 355, 923, 1065, 1553, 2769, 4615, 4659, 7765, 13845, 20189, 23295, 60567, 100945, 110263, 302835, 330789, 551315, 1433419, 1653945, 4300257, 7167095, 21501285]

約数ペア:

[(1, 21501285), (3, 7167095), (5, 4300257), (13, 1653945), (15, 1433419), (39, 551315), (65, 330789), (71, 302835), (195, 110263), (213, 100945), (355, 60567), (923, 23295), (1065, 20189), (1553, 13845), (2769, 7765), (4615, 4659)]