21728665

素因数分解:

$5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{2711}}^1$

素因数の和:2952

約数の個数: 16

約数和(自身を含む): 29940480

約数和(自身を除く): 8211815

約数列:

[1, 5, 7, 35, 229, 1145, 1603, 2711, 8015, 13555, 18977, 94885, 620819, 3104095, 4345733, 21728665]

約数ペア:

[(1, 21728665), (5, 4345733), (7, 3104095), (35, 620819), (229, 94885), (1145, 18977), (1603, 13555), (2711, 8015)]