21604840

素因数分解:

$2^3\times 5^1\times {\mathrm{540121}}^1$

素因数の和:540132

約数の個数: 16

約数和(自身を含む): 48610980

約数和(自身を除く): 27006140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 540121, 1080242, 2160484, 2700605, 4320968, 5401210, 10802420, 21604840]

約数ペア:

[(1, 21604840), (2, 10802420), (4, 5401210), (5, 4320968), (8, 2700605), (10, 2160484), (20, 1080242), (40, 540121)]