278399875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 402554880

約数和(自身を除く): 124155005

約数列:

[1, 5, 13, 19, 25, 65, 71, 95, 125, 127, 247, 325, 355, 475, 635, 923, 1235, 1349, 1625, 1651, 1775, 2375, 2413, 3175, 4615, 6175, 6745, 8255, 8875, 9017, 12065, 15875, 17537, 23075, 30875, 31369, 33725, 41275, 45085, 60325, 87685, 115375, 117221, 156845, 168625, 171323, 206375, 225425, 301625, 438425, 586105, 784225, 856615, 1127125, 2192125, 2227199, 2930525, 3921125, 4283075, 11135995, 14652625, 21415375, 55679975, 278399875]

約数ペア:

[(1, 278399875), (5, 55679975), (13, 21415375), (19, 14652625), (25, 11135995), (65, 4283075), (71, 3921125), (95, 2930525), (125, 2227199), (127, 2192125), (247, 1127125), (325, 856615), (355, 784225), (475, 586105), (635, 438425), (923, 301625), (1235, 225425), (1349, 206375), (1625, 171323), (1651, 168625), (1775, 156845), (2375, 117221), (2413, 115375), (3175, 87685), (4615, 60325), (6175, 45085), (6745, 41275), (8255, 33725), (8875, 31369), (9017, 30875), (12065, 23075), (15875, 17537)]