21081638

素因数分解:

$2^1\times {\mathrm{37}}^1\times {\mathrm{347}}^1\times {\mathrm{821}}^1$

素因数の和:1207

約数の個数: 16

約数和(自身を含む): 32610384

約数和(自身を除く): 11528746

約数列:

[1, 2, 37, 74, 347, 694, 821, 1642, 12839, 25678, 30377, 60754, 284887, 569774, 10540819, 21081638]

約数ペア:

[(1, 21081638), (2, 10540819), (37, 569774), (74, 284887), (347, 60754), (694, 30377), (821, 25678), (1642, 12839)]