128664920

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{443}}^1$

素因数の和:644

約数の個数: 64

約数和(自身を含む): 297781920

約数和(自身を除く): 169117000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 137, 212, 265, 274, 424, 443, 530, 548, 685, 886, 1060, 1096, 1370, 1772, 2120, 2215, 2740, 3544, 4430, 5480, 7261, 8860, 14522, 17720, 23479, 29044, 36305, 46958, 58088, 60691, 72610, 93916, 117395, 121382, 145220, 187832, 234790, 242764, 290440, 303455, 469580, 485528, 606910, 939160, 1213820, 2427640, 3216623, 6433246, 12866492, 16083115, 25732984, 32166230, 64332460, 128664920]

約数ペア:

[(1, 128664920), (2, 64332460), (4, 32166230), (5, 25732984), (8, 16083115), (10, 12866492), (20, 6433246), (40, 3216623), (53, 2427640), (106, 1213820), (137, 939160), (212, 606910), (265, 485528), (274, 469580), (424, 303455), (443, 290440), (530, 242764), (548, 234790), (685, 187832), (886, 145220), (1060, 121382), (1096, 117395), (1370, 93916), (1772, 72610), (2120, 60691), (2215, 58088), (2740, 46958), (3544, 36305), (4430, 29044), (5480, 23479), (7261, 17720), (8860, 14522)]