12801280

素因数分解:

$2^8\times 5^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:231

約数の個数: 72

約数和(自身を含む): 31309992

約数和(自身を除く): 18508712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 128, 137, 146, 160, 256, 274, 292, 320, 365, 548, 584, 640, 685, 730, 1096, 1168, 1280, 1370, 1460, 2192, 2336, 2740, 2920, 4384, 4672, 5480, 5840, 8768, 9344, 10001, 10960, 11680, 17536, 18688, 20002, 21920, 23360, 35072, 40004, 43840, 46720, 50005, 80008, 87680, 93440, 100010, 160016, 175360, 200020, 320032, 400040, 640064, 800080, 1280128, 1600160, 2560256, 3200320, 6400640, 12801280]

約数ペア:

[(1, 12801280), (2, 6400640), (4, 3200320), (5, 2560256), (8, 1600160), (10, 1280128), (16, 800080), (20, 640064), (32, 400040), (40, 320032), (64, 200020), (73, 175360), (80, 160016), (128, 100010), (137, 93440), (146, 87680), (160, 80008), (256, 50005), (274, 46720), (292, 43840), (320, 40004), (365, 35072), (548, 23360), (584, 21920), (640, 20002), (685, 18688), (730, 17536), (1096, 11680), (1168, 10960), (1280, 10001), (1370, 9344), (1460, 8768), (2192, 5840), (2336, 5480), (2740, 4672), (2920, 4384)]