28057725

素因数分解:

$3^3\times 5^2\times {\mathrm{197}}^1\times {\mathrm{211}}^1$

素因数の和:427

約数の個数: 48

約数和(自身を含む): 52050240

約数和(自身を除く): 23992515

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 197, 211, 225, 591, 633, 675, 985, 1055, 1773, 1899, 2955, 3165, 4925, 5275, 5319, 5697, 8865, 9495, 14775, 15825, 26595, 28485, 41567, 44325, 47475, 124701, 132975, 142425, 207835, 374103, 623505, 1039175, 1122309, 1870515, 3117525, 5611545, 9352575, 28057725]

約数ペア:

[(1, 28057725), (3, 9352575), (5, 5611545), (9, 3117525), (15, 1870515), (25, 1122309), (27, 1039175), (45, 623505), (75, 374103), (135, 207835), (197, 142425), (211, 132975), (225, 124701), (591, 47475), (633, 44325), (675, 41567), (985, 28485), (1055, 26595), (1773, 15825), (1899, 14775), (2955, 9495), (3165, 8865), (4925, 5697), (5275, 5319)]