18890320

素因数分解:

$2^4\times 5^1\times {\mathrm{236129}}^1$

素因数の和:236142

約数の個数: 20

約数和(自身を含む): 43920180

約数和(自身を除く): 25029860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 236129, 472258, 944516, 1180645, 1889032, 2361290, 3778064, 4722580, 9445160, 18890320]

約数ペア:

[(1, 18890320), (2, 9445160), (4, 4722580), (5, 3778064), (8, 2361290), (10, 1889032), (16, 1180645), (20, 944516), (40, 472258), (80, 236129)]