28161920

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{557}}^1$

素因数の和:655

約数の個数: 64

約数和(自身を含む): 68299200

約数和(自身を除く): 40137280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 395, 557, 632, 640, 790, 1114, 1264, 1580, 2228, 2528, 2785, 3160, 4456, 5056, 5570, 6320, 8912, 10112, 11140, 12640, 17824, 22280, 25280, 35648, 44003, 44560, 50560, 71296, 88006, 89120, 176012, 178240, 220015, 352024, 356480, 440030, 704048, 880060, 1408096, 1760120, 2816192, 3520240, 5632384, 7040480, 14080960, 28161920]

約数ペア:

[(1, 28161920), (2, 14080960), (4, 7040480), (5, 5632384), (8, 3520240), (10, 2816192), (16, 1760120), (20, 1408096), (32, 880060), (40, 704048), (64, 440030), (79, 356480), (80, 352024), (128, 220015), (158, 178240), (160, 176012), (316, 89120), (320, 88006), (395, 71296), (557, 50560), (632, 44560), (640, 44003), (790, 35648), (1114, 25280), (1264, 22280), (1580, 17824), (2228, 12640), (2528, 11140), (2785, 10112), (3160, 8912), (4456, 6320), (5056, 5570)]