20921348

素因数分解:

$2^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{7703}}^1$

素因数の和:7811

約数の個数: 24

約数和(自身を含む): 42279552

約数和(自身を除く): 21358204

約数列:

[1, 2, 4, 7, 14, 28, 97, 194, 388, 679, 1358, 2716, 7703, 15406, 30812, 53921, 107842, 215684, 747191, 1494382, 2988764, 5230337, 10460674, 20921348]

約数ペア:

[(1, 20921348), (2, 10460674), (4, 5230337), (7, 2988764), (14, 1494382), (28, 747191), (97, 215684), (194, 107842), (388, 53921), (679, 30812), (1358, 15406), (2716, 7703)]