21638115

素因数分解:

$3^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1871}}^1$

素因数の和:2139

約数の個数: 24

約数和(自身を含む): 37672128

約数和(自身を除く): 16034013

約数列:

[1, 3, 5, 9, 15, 45, 257, 771, 1285, 1871, 2313, 3855, 5613, 9355, 11565, 16839, 28065, 84195, 480847, 1442541, 2404235, 4327623, 7212705, 21638115]

約数ペア:

[(1, 21638115), (3, 7212705), (5, 4327623), (9, 2404235), (15, 1442541), (45, 480847), (257, 84195), (771, 28065), (1285, 16839), (1871, 11565), (2313, 9355), (3855, 5613)]