28147779

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 46425600

約数和(自身を除く): 18277821

約数列:

[1, 3, 9, 11, 33, 59, 61, 79, 99, 177, 183, 237, 531, 549, 649, 671, 711, 869, 1947, 2013, 2607, 3599, 4661, 4819, 5841, 6039, 7821, 10797, 13983, 14457, 32391, 39589, 41949, 43371, 51271, 53009, 118767, 153813, 159027, 284321, 356301, 461439, 477081, 852963, 2558889, 3127531, 9382593, 28147779]

約数ペア:

[(1, 28147779), (3, 9382593), (9, 3127531), (11, 2558889), (33, 852963), (59, 477081), (61, 461439), (79, 356301), (99, 284321), (177, 159027), (183, 153813), (237, 118767), (531, 53009), (549, 51271), (649, 43371), (671, 41949), (711, 39589), (869, 32391), (1947, 14457), (2013, 13983), (2607, 10797), (3599, 7821), (4661, 6039), (4819, 5841)]