28639840

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{9421}}^1$

素因数の和:9455

約数の個数: 48

約数和(自身を含む): 71230320

約数和(自身を除く): 42590480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 9421, 18842, 37684, 47105, 75368, 94210, 150736, 178999, 188420, 301472, 357998, 376840, 715996, 753680, 894995, 1431992, 1507360, 1789990, 2863984, 3579980, 5727968, 7159960, 14319920, 28639840]

約数ペア:

[(1, 28639840), (2, 14319920), (4, 7159960), (5, 5727968), (8, 3579980), (10, 2863984), (16, 1789990), (19, 1507360), (20, 1431992), (32, 894995), (38, 753680), (40, 715996), (76, 376840), (80, 357998), (95, 301472), (152, 188420), (160, 178999), (190, 150736), (304, 94210), (380, 75368), (608, 47105), (760, 37684), (1520, 18842), (3040, 9421)]