28397691

素因数分解:

$3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{3989}}^1$

素因数の和:4115

約数の個数: 24

約数和(自身を含む): 47305440

約数和(自身を除く): 18907749

約数列:

[1, 3, 7, 9, 21, 63, 113, 339, 791, 1017, 2373, 3989, 7119, 11967, 27923, 35901, 83769, 251307, 450757, 1352271, 3155299, 4056813, 9465897, 28397691]

約数ペア:

[(1, 28397691), (3, 9465897), (7, 4056813), (9, 3155299), (21, 1352271), (63, 450757), (113, 251307), (339, 83769), (791, 35901), (1017, 27923), (2373, 11967), (3989, 7119)]