28191891

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2791}}^1$

素因数の和:2851

約数の個数: 32

約数和(自身を含む): 47531008

約数和(自身を除く): 19339117

約数列:

[1, 3, 7, 13, 21, 37, 39, 91, 111, 259, 273, 481, 777, 1443, 2791, 3367, 8373, 10101, 19537, 36283, 58611, 103267, 108849, 253981, 309801, 722869, 761943, 1342471, 2168607, 4027413, 9397297, 28191891]

約数ペア:

[(1, 28191891), (3, 9397297), (7, 4027413), (13, 2168607), (21, 1342471), (37, 761943), (39, 722869), (91, 309801), (111, 253981), (259, 108849), (273, 103267), (481, 58611), (777, 36283), (1443, 19537), (2791, 10101), (3367, 8373)]