28219919

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 36879360

約数和(自身を除く): 8659441

約数列:

[1, 7, 13, 23, 91, 97, 139, 161, 299, 679, 973, 1261, 1807, 2093, 2231, 3197, 8827, 12649, 13483, 15617, 22379, 29003, 41561, 94381, 175279, 203021, 290927, 310109, 1226953, 2170763, 4031417, 28219919]

約数ペア:

[(1, 28219919), (7, 4031417), (13, 2170763), (23, 1226953), (91, 310109), (97, 290927), (139, 203021), (161, 175279), (299, 94381), (679, 41561), (973, 29003), (1261, 22379), (1807, 15617), (2093, 13483), (2231, 12649), (3197, 8827)]