128945920

素因数分解:

$2^8\times 5^1\times {\mathrm{131}}^1\times {\mathrm{769}}^1$

素因数の和:921

約数の個数: 72

約数和(自身を含む): 311628240

約数和(自身を除く): 182682320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 131, 160, 256, 262, 320, 524, 640, 655, 769, 1048, 1280, 1310, 1538, 2096, 2620, 3076, 3845, 4192, 5240, 6152, 7690, 8384, 10480, 12304, 15380, 16768, 20960, 24608, 30760, 33536, 41920, 49216, 61520, 83840, 98432, 100739, 123040, 167680, 196864, 201478, 246080, 402956, 492160, 503695, 805912, 984320, 1007390, 1611824, 2014780, 3223648, 4029560, 6447296, 8059120, 12894592, 16118240, 25789184, 32236480, 64472960, 128945920]

約数ペア:

[(1, 128945920), (2, 64472960), (4, 32236480), (5, 25789184), (8, 16118240), (10, 12894592), (16, 8059120), (20, 6447296), (32, 4029560), (40, 3223648), (64, 2014780), (80, 1611824), (128, 1007390), (131, 984320), (160, 805912), (256, 503695), (262, 492160), (320, 402956), (524, 246080), (640, 201478), (655, 196864), (769, 167680), (1048, 123040), (1280, 100739), (1310, 98432), (1538, 83840), (2096, 61520), (2620, 49216), (3076, 41920), (3845, 33536), (4192, 30760), (5240, 24608), (6152, 20960), (7690, 16768), (8384, 15380), (10480, 12304)]