21211795

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{3413}}^1$

素因数の和:3542

約数の個数: 16

約数和(自身を含む): 28022112

約数和(自身を除く): 6810317

約数列:

[1, 5, 11, 55, 113, 565, 1243, 3413, 6215, 17065, 37543, 187715, 385669, 1928345, 4242359, 21211795]

約数ペア:

[(1, 21211795), (5, 4242359), (11, 1928345), (55, 385669), (113, 187715), (565, 37543), (1243, 17065), (3413, 6215)]