129281920

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{2557}}^1$

素因数の和:2655

約数の個数: 64

約数和(自身を含む): 313099200

約数和(自身を除く): 183817280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 395, 632, 640, 790, 1264, 1580, 2528, 2557, 3160, 5056, 5114, 6320, 10112, 10228, 12640, 12785, 20456, 25280, 25570, 40912, 50560, 51140, 81824, 102280, 163648, 202003, 204560, 327296, 404006, 409120, 808012, 818240, 1010015, 1616024, 1636480, 2020030, 3232048, 4040060, 6464096, 8080120, 12928192, 16160240, 25856384, 32320480, 64640960, 129281920]

約数ペア:

[(1, 129281920), (2, 64640960), (4, 32320480), (5, 25856384), (8, 16160240), (10, 12928192), (16, 8080120), (20, 6464096), (32, 4040060), (40, 3232048), (64, 2020030), (79, 1636480), (80, 1616024), (128, 1010015), (158, 818240), (160, 808012), (316, 409120), (320, 404006), (395, 327296), (632, 204560), (640, 202003), (790, 163648), (1264, 102280), (1580, 81824), (2528, 51140), (2557, 50560), (3160, 40912), (5056, 25570), (5114, 25280), (6320, 20456), (10112, 12785), (10228, 12640)]